Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
Zelus Elastic Nylon Sports Band For Fitbit Air
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Zelus Elastic Nylon Sports Band For Fitbit Air

Zelus Elastic Nylon Sports Band For Fitbit Air

Regular price $39.99
Regular price $79.99 Sale price $39.99 Save $40.00

In Stock - Fast Shipping With USPS

Band Color: Orange
Band Width: Fitbit Air

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$107.97 $119.97
Buy 4 & Save 15% Best value
$135.97 $159.96
  • Free Shipping Orders $50+
  • Easy Returns
  • 100 Days Guarantee
  • Less than 0.5% of buyers use our money-back guarantee

Built for runners who need their tracker to stay put. The Zelus features stretchy premium nylon that sits flush against your skin for accurate heart rate tracking, so you get reliable data whether you are pushing through intervals, logging easy miles, or cooling down after a hard session.

Whether you are training for a race or just staying active, the Zelus keeps your Fitbit Air secure and comfortable mile after mile.

Features:

  • Stretchy Premium Nylon moves naturally with your arm
  • Flush Fit Design sits against your skin for accurate tracking
  • Breathable Construction keeps your arm cool during activity
  • Orange Color Accents add a stylish pop along the edges
  • Fully Adjustable Fit lets you customize for perfect comfort
  • Easy Installation connects to your Fitbit Air in seconds
  • Lightweight Build stays comfortable without added bulk
  • Elastic Design prevents sliding and bunching during movement
  • Durable Material holds up through regular runs and workouts
  • Available in 4 Colors

Details & Compatibility:

  • Fits Arm Size:
    • 11.0” - 17.7” (280mm - 450mm)
  • Compatible With: Fitbit Air

Shipping and returns

Shipping

We offer FREE Tracked shipping on all orders over $50! For orders under $50 we charge $4.95. 📦

We offer Shipping to Canada, United Kingdom, Australia and New Zealand.

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, depending on your country or region, 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 center. To start a return just contact our support team at support@astrastraps.com 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 $50. We cover any loss in transit.

Size guide


At Astra Straps, all our bands have clear and specific 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.

Your Apple watch will say the measurement on the back.

If you cant find the size on the back 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 the you have the choice between 38MM, 40MM, 41MM, 42MM, 44MM, 45MM & 49MM, you can also enter your watch model number into a search engine to find what size your watch uses.

Apple Watch 7, 8, and 9: The Apple Watch Series 7, 8, and the newly released Series 9 are compatible with a wide range of our bands, including sizes 38MM, 40MM, 41MM, 42MM, 44MM, 45MM, and 49MM. For watch cases, they fit the 41MM and 45MM sizes.

Apple Watch Ultra and Ultra 2: The recently introduced Apple Watch Ultra and Ultra 2 are compatible with 45MM and 49MM bands. As for the watch cases, both the Ultra and Ultra 2 models are available in a 49MM size.

Using these three measurements, you are now ready to grab your band!

Ask a question

View full details

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.

Are third-party Apple Watch Bands safe to use?

Yes. All Astra Straps use precision-machined stainless steel connectors that lock securely into your Apple Watch — the same mechanism Apple uses. They won't scratch your watch or interfere with sensors like heart rate or blood oxygen. All our materials are skin-safe and nickel-free, and using a Astra Straps band does not void your Apple Watch warranty.

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.

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 $50, shipping is on us. Because let’s be real, no one wants to pay extra for shipping.

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!

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.

Ready to fall in love with your watch again? Join the 100,000+ people who can't stop showing off their Astra bands.

  • 5 stars: 29 (88%)
  • 4 stars: 4 (12%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
W
Weston K.
Clean and Minimal

I like how minimal it looks. The fabric texture gives it some detail without making the tracker look bulky.

C
Cyrus H.
LOVE how easy this adjusts

LOVE the adjustable design. I can get the fit exactly where I want instead of choosing between two buckle holes.

Q
Quincy B.
Really Nice Material

The weave feels nice and doesn't have that cheap rough nylon feeling I was worried about. Very happy with it.

J
Jace N.
fits exactly how I wanted

Adjustment range is great. Got it sitting snug without feeling like it's cutting into my wrist.

C
Cason W.
Breathable and lightweight

breathable, lightweight and doesn't feel bulky. Pretty much everything I wanted in a replacement band.

T
Tate G.
easy to get the right fit

Being able to make tiny adjustments is probably my favorite part. I can loosen it slightly whenever my wrist feels swollen after a workout.

G
Gideon T.
Soft on the Wrist

The nylon is softer than I expected. No scratchy edges or anything bothering my skin so far.

Z
Zeke F.
great alternative to silicone

I wanted to get away from silicone because my wrist gets sweaty underneath it. The woven nylon feels much nicer for daily wear.

M
Madden C.
Easy Everyday Band

This has basically become my everyday band. Easy to put on and comfortable enough that I don't think about it.

F
Foster D.
Perfect for the Gym

Perfect for gym days. Doesn't move around much and I can quickly tighten it before starting a workout.

U
Ulric P.
Great for Running

Great running band so far. It stays in place without needing to be crazy tight around my wrist.

H
Harlan P.
finally a band that breathes

finally found something I can wear through a whole workday without wanting to take my tracker off ??

A
Anders R.
Adjusts in Seconds

Takes seconds to loosen or tighten. Really convenient when switching between normal wear and exercise.

O
Orson J.
Perfect for Smaller Wrists

I have pretty small wrists and buckle straps usually leave a bunch of extra material. This adjusts much cleaner for me.

G
Griffin V.
solid little upgrade

solid little upgrade for the price. The fit is easy to customize and the band feels comfortable enough for everyday use.

B
Brock V.
Perfect Lightweight Band

Really lightweight on the wrist and the woven material feels nice. Been wearing it every day since it arrived.

X
Xander C.
Surprisingly Secure

Was a little unsure how secure this style would be but it's held up fine through normal daily use and workouts.

K
Koa D.
Lightweight but Feels Secure

Feels almost weightless but still holds everything securely. Nice balance between comfort and stability.

D
Deacon J.
exactly what I needed

Needed a simple replacement and this ended up being better than expected. Comfortable from the first day.

E
Emmett K.
Way Better Than My Old Strap

My old strap always felt stiff by the end of the day. This one flexes with my wrist and feels way better.

R
Ronan S.
good fit, no complaints

good fit and easy adjustment. Nothing fancy, it just works exactly the way I hoped it would.

Y
Yates N.
SO much more comfortable

SO much nicer than the stiff strap I was using before. Soft, flexible and easy to adjust.

L
Leander F.
really comfortable nylon

really comfortable material. I've worn it for long walks and around the house and forgot it was even there.

E
Evander P.
Feels Better Than Expected

Honestly thought the nylon might feel rough but nope. It's flexible and sits smoothly against my wrist.

S
Stellan M.
My New Daily Band

I've rotated through several bands and this is the one I keep reaching for. Lightweight and really easy to wear.

F
Fletcher B.
great for workouts

I've used it for walking, cycling and a few gym sessions. Stays secure and doesn't feel heavy once I start sweating.

B
Baylor T.
Nice Sporty Look

Sporty without looking like a giant fitness strap. I've worn it with gym clothes and casual outfits and it works with both.

P
Perry L.
comfortable even when sleeping

Didn't specifically buy it for sleeping but I've ended up keeping it on overnight. Much more comfortable than my previous band.

I
Ira W.
Nice Clean Look

Has a really clean look on the wrist. Nothing bulky and the woven texture looks better in person.

V
Vance H.
doesnt get annoying after hours

Wore this basically all day yesterday and it never started bothering me. That's rare for me with watch bands lol.

A
Arlen M.
super comfy for all day wear

Was looking for something softer than my usual band and this nylon one is MUCH more comfortable. I barely notice it after a while.

N
Nico R.
the orange trim looks GOOD

Got the gray/orange version and the orange edge gives it just enough color without being too loud. Looks GOOD.

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."