Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Latest

Flexilis Silicone Sports Strap For Fitbit Air

Flexilis Silicone Sports Strap For Fitbit Air

Regular price £24.99 GBP
Regular price £49.99 GBP Sale price £24.99 GBP Save £25.00

In Stock - Fast Shipping With Royal Mail

Strap Colour: Black Buckle
Strap Width: Fitbit Air

Buy More and Save!

Buy 2 & Save 5%
£47.48 £49.98
Buy 3 & Save 10% Popular
£67.47 £74.97
Buy 4 & Save 15% Best value
£84.97 £99.96
  • Free Shipping Orders £40+
  • Easy Returns
  • 100 Days Guarantee

Simple, reliable, and ready for anything. The Flexilis wraps your Fitbit Air in premium silicone that handles sweaty workouts, rainy commutes, and busy days without fuss, keeping your tracker secure and your wrist comfortable from morning to night.

If you want a dependable everyday strap that just works, the Flexilis delivers.

Features:

  • Premium Silicone Material feels soft and comfortable all day
  • Pin Buckle Closure provides secure, adjustable fit
  • Lightweight and Waterproof Design handles workouts and daily wear
  • Complete Device Access keeps all buttons and sensors usable
  • Easy Installation connects to your Fitbit Air in seconds
  • High-Quality Material stays durable through regular use
  • Easy to Clean wipes down quickly and stays fresh
  • Versatile Style suits any outfit or occasion
  • Available in 16 Colours

Details & Compatibility:

  • Fits Wrist Size:
    • 140mm - 230mm (5.5" - 9.05")
  • Compatible With: Fitbit Air

Shipping and returns

Shipping

We offer FREE Tracked shipping on all orders over £40! For orders under £40, we charge £3.95. 📦

We process orders between Monday and Friday. Please note that we require 2 to 3 working days on average to fulfill your order before dispatching it. Rest-assured we are doing everything in our power to get your order to you as soon as possible!

Once your order is dispatched, estimated delivery time is between 5 to 10 business days. Please consider any holidays or global events that might impact delivery times.

Returns

We offer hassle-free returns to our nearest dispatch centre. To start a return just contact our support team at support@astrastraps.co.uk and we will make the process easy and effortless.

Please Note:  Due to delays caused by huge pressure on international and local shipping companies, orders may be delayed for arrival.

Our guarantee

The Astra Standard
Engineered for quality. Protected by our guarantee.
Premium Build
Rigorous QC checks ensure every strap meets the highest tier of durability.
100-Days Guarantee
Full coverage against defects, Faults. 
Insured Shipping
Free tracked shipping over £40. We cover any loss in transit.

Size guide

At Astra Straps, all our straps have specific and clear sizes indicated. Please check the sizing guide below before ordering. If you are still unsure, you may contact us here.


1. How do I know my wrist size?

Simply use a flexible measuring tape to wrap around your wrist and record the measurement on the tape that overlaps the zero end of the tape OR just grab any string/paper strips to do the same, then lay the string on a ruler to get your accurate wrist size.

In most cases, knowing your wrist size/length will be sufficient. Check your wrist size against the size of the strap that you wish to purchase on the individual product details page.

From there, you can select and purchase our watch straps: Small (S), Large (L) or Free Size.



2. What is the watch band width / watch lug measurement?



In certain cases, knowing your wrist size alone may not be sufficient. In such a scenario, you will need the watches' band width size, also know as the watch lug width size.

Place the watch with the watch face facing up. Take the measurement of the distance between the lugs (where the watch strap fits).

For Apple Watches you have the choice between 38MM, 40MM, 42MM & 44MM, you can enter your watch model number into a search engine to find what size your watch uses.

With these two pieces of measurements, you are now ready to grab your strap!

Ask a question

View full details
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps
Flexilis Silicone Fitbit Air Sports Band - Astra Straps

Questions? We've Got Answers! ⭐

Real talk about your new favorite watch band

Will this actually fit my watch?

Absolutely! Whether you’re rocking the original Series 1 or the latest model, we’ve got you covered. Just check the size on the back of your watch (if you're not sure), and we'll handle the rest. It’s that easy.

What makes Astra Straps different?

Great question! At Astra Straps, we don’t just make bands – we craft them.

Every single band is hand-finished to ensure the highest quality and attention to detail. We’re all about combining top-notch materials with unique designs that reflect your personal style.

Plus, we test every band for comfort and durability, so you can count on a strap that’s as strong as it is stylish. When you choose Astra Straps, you’re not just getting a band – you’re getting a piece of wearable art.

Is it really comfortable, or just good-looking?

Why settle for one when you can have both? Our bands are designed to look amazing and feel just as great.

We’ve obsessed over comfort, so you don’t have to. No weird pinching or “I need to take this off” moments – just a band that feels as good as it looks.

Will it stand up to my crazy life?

We’ve put our bands through the wringer because we know you don’t have time to baby your watch.

Whether you're hitting the gym, caught in the rain, or dealing with your most accident-prone friend, these bands are built to last. Bring on the hustle!

How do I pick the right size?

Most people use a tape measure (or even just a string) to wrap around their wrist, then add half an inch. But don’t stress – most of our bands are super adjustable, so unless your wrists are tiny or extra large, the standard size should work just fine. Still not sure? Reach out to us, we’re here to help!

What if I don’t love it?

We get it – sometimes things just don’t work out. If you’re not in love within 100 days, send it back, no questions asked. We’ll refund you, no drama. We want you to have a band you absolutely love.

When will it get here?

We’re all about speed. Most orders ship within 1-2 days, and you can expect it to arrive shortly after.

Plus, if you spend over £40, shipping is on us. Because let’s be real, no one wants to pay extra for shipping.

Do I need to buy anything else?

Nope! We believe in keeping things simple. Everything you need is in the box. No sneaky extra fees or “must-have” connectors. Just open it, snap it on, and you’re good to go.

How do I keep it looking fresh?

Super easy! Silicone bands just need a quick rinse with soap and water. Leather ones? Just a gentle wipe down.

Metal ones can be cleaned with a soft cloth. And don’t worry – we’ll send you a full care guide, but these bands are pretty low maintenance.

  • 5 stars: 29 (85%)
  • 4 stars: 5 (15%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
E
Eve Mallinson
Would Buy Again

Would definitely order another one, probably in blue or green next time.

D
Daisy Pickering
Exactly What I Needed

Exactly what I was looking for. Simple, comfortable and easy to put on.

M
Martha Ellwood
Comfortable for everyday wear

I've been wearing this from morning until night and it stays comfortable. The material is flexible and doesn't dig into my wrist.

M
Maisie Crookes
Easy to Clean

Gets sweaty at the gym obviously, but it's really easy to wipe down afterward and dries quickly.

T
Tabitha Renshaw
Good Fit on My Wrist

I have a smaller wrist and was able to get a snug fit without having a ton of uncomfortable extra material.

L
Laura Templeton
Secure Without Being Tight

I like that I don't have to tighten it excessively to keep the tracker stable. Secure fit without squeezing my wrist.

F
Florence Drummond
Better Than My Old strap

My original strap was getting worn out and honestly I like this replacement better. Feels comfortable and the fit is easy to adjust.

R
Rebecca Ainsworth
Happy With This strap

Happy with this purchase. The strap feels secure and the black one looks exactly how I wanted.

K
Kirsty Beaumont
Love the colour Options!!

I bought one of the two-tone colours and it gives the tracker a completely different look. Might grab another colour just to switch things up.

S
Sophie Denham
Great for Running

Been using it for morning runs and so far so good. My tracker stays secure and the strap doesn't bounce around.

J
Jodie Atkinson
Great for the Gym

Used it for lifting and treadmill sessions this week. Stayed secure the entire time and didn't slide around when I got sweaty.

C
Claudia Everitt
Great Workout strap

Great for workouts. I've used it for weights, cycling and running without it coming loose.

M
Mollie Kirkham
Stays Put During Workouts

Did a pretty intense cardio session with this and it stayed right where I put it. No loosening halfway through.

F
Faye Merrick
Nice Sporty Look

Has a nice sporty look without being over the top. Works just as well with casual clothes as it does with gym gear.

R
Rachael Goddard
Great Little Upgrade

Nice inexpensive way to freshen up my Fitbit. Installation was straightforward and it feels secure once everything is in place.

Z
Zara Newcombe
Fits Like It Should

Snapped my tracker into it and the fit was right on. No loose movement around the edges.

L
Lydia Bramwell
Fits Really Well

The fit is really good. No weird gaps around the tracker and it stays in place even when I'm moving around a lot.

G
Georgina Willoughby
Solid Replacement strap

Solid replacement. Recommended.

N
Nicola Fairbank
Very Easy to Wear

Easy to buckle, easy to adjust and doesn't take forever to put on when I'm rushing out the door.

C
Cara Bardsley
Easy to Adjust

Plenty of adjustment holes so getting the right fit was easy. I can wear it slightly looser during the day and tighten it for workouts.

V
Victoria Garside
Perfect for Daily Use

Pretty much became my everyday strap immediately. Comfortable, low profile and easy to match with everything.

J
Jemma Poulton
Surprisingly Comfortable

Actually really comfortable. I was expecting it to feel stiffer based on the pictures but it bends nicely around my wrist.

L
Leanne Sutcliffe
Looks Better in Person

Looks nicer in person than I expected. The shape around the tracker is neat and the finish doesn't look cheap.

L
Louise Henshaw
Nice Secure Fit

I was mostly worried about the tracker popping out but it feels very secure in the strap. Haven't had any issues so far.

H
Hannah Braithwaite
Good Value

For the price I'm impressed. Fit was correct and it feels better than I expected.

A
Aimee Telford
Soft and Flexible

The material is softer than I expected. Flexible enough to move naturally with my wrist without feeling flimsy.

K
Katherine Lonsdale
No Irritation Yet

My skin can get annoyed with some watch straps but this one hasn't caused me any problems so far. Very happy with it.

L
Lottie Rawlings
Comfortable All Day

Wore it through a full workday, evening walk and sleep. No discomfort or annoying pressure points.

D
Danielle Brierley
Lightweight and Comfy

Very lightweight. Doesn't add much bulk to the tracker and is comfortable enough for long walks.

J
Jennifer Lockwood
Simple and Practical

Nothing complicated here, just a good practical strap that does what it's supposed to do.

C
Cerys Whitaker
Perfect replacement for My Fitbit

Needed a replacement strap and this worked out perfectly. Fits my Fitbit Air securely and looks almost like it came with it.

A
Amy Beresford
Feels Durable So Far

I've only had it a few weeks but it feels sturdy. The buckle and adjustment holes are holding up well.

Why 100,000+ Customers Choose Astra Straps

390+ Styles. Premium quality. Prices that actually let you switch it up.

Endless

Style

Match every mood,
outfit, occasion

Premium

Materials

No cheap

plastic here

Built

To Last

Survives workouts, adventures, life

Perfect

Fit

Comfortable

from day one

100 Day

Warranty

We’ve got you covered for 100 days

  • “I recently got the Astra Apple Watch band and am very impressed with its quality and stunning design. Right from the packaging, it was clear this band was made with great care. The premium-grade silicone is soft against the skin, comfortable for all day wear, and durable enough for an active lifestyle. Im thrilled with my purchase."

  • “Don't waste money on expensive Apple bands. This one is stylish, fits well, and is excellently made. You can get several of these for the price of one official band."

  • “Ive had many Apple watch bands over the years, and this is the best, coolest, and most comfortable one yet. It makes the watch look extremely upscale. A friend paid much more for the same band elsewhere and couldn't believe my price. Highly recommended. Love!"

  • “Amazing quality, very flexible and not stiff like other straps. Doesn't have that cheap band smell. Highly recommend, and great to have the option to match the strap color with my style."

  • “I was looking for a band thats not only exceptionally comfy but also stylish and durable. These bands tick all those boxes. I appreciate the bands design where it tucks in neatly. My original band caught on everything, but this one has a much smoother design. I love it!"

  • “Astra Straps' customer service is top-notch. I had a question about sizing, and they responded promptly with helpful guidance. It's refreshing to see a company that values its customers."

  • “Astra Straps has been a game-changer for my watch collection! Their bands are not only stylish but incredibly durable. I've swapped out all my old bands for Astra and couldn't be happier."

  • “The watch bands fit perfectly around my wrist as there are plenty of holes to adjust to my wrist size. The colors are very nice. The feel of the band is smooth. The way the band clasps is a plus as it is very secure on my wrist."