BYISYUE 20mm Sport Watch Strap (silicone/TPU) for Garmin Approach S50/S44/S42/S40/S12/J1 & Forerunner 570 42mm
Product description
If you’ve got a Garmin wearable that sees a fair bit of movement, a strap replacement is often the simplest way to refresh comfort and keep things practical. This BYISYUE 20mm Sport Watch Strap is built as a breathable silicone-style band for compatible Garmin models, with a quick, single-button removal style and a locking clasp design.
It’s the sort of accessory you buy when the original band has become a bit tired, or when you want an extra colour for day-to-day wear. On paper it’s aimed at regular training and everyday use rather than anything overly fancy.
Quick overview
This is a 20mm replacement sport strap made from TPU silicone-style material. The brand positions it for an all-day training setup: light, smooth against the skin, and designed to cope with day-to-day wear. It’s also meant to be easy to fit—no awkward fiddling—so swapping bands doesn’t have to become a chore.
The compatibility list includes several Garmin sport watches such as the Approach S50/S44/S42/S40/S12/J1 and various Forerunner models mentioned in the listing, including the Forerunner 570 in the 42mm size.
A small but important limitation: the listing explicitly notes it’s not for Garmin Forerunner 570 47mm. If your watch is the 47mm variant, this is one to skip.
What it’s made for (and where it fits best)
This strap makes sense if you want a breathable, lightweight band for training—running, cycling, walking, hiking/camping, and similar outdoorsy days. The listing also frames it as suitable for regular daily use and office wear, so it’s not only about gym sessions.
A practical example: if you take your watch from a morning run straight into a workday, you’ll likely appreciate a band that sits comfortably and doesn’t feel bulky. The material is described as soft and light, and the design goal here is comfort you can live with.
It’s not the best approach if you’re chasing a premium, high-end finish or specialised performance features beyond the strap itself—this is more of a straightforward replacement than a tech upgrade.
Where it stands out
The two most purchase-relevant bits are comfort and security.
First, the material: the band is described as made from high-quality TPU, with a breathable, silicone-like feel. It’s also described as dust-proof and waterproof, which is the kind of reassurance you want if you train in mixed conditions or you simply get splashes and sweat during normal use.
Second, the clasp: the listing mentions a “new closure” with improved locking, designed to prevent the watch from falling off if the strap feels a bit loose. That’s exactly the sort of day-to-day worry you’d rather not have with a replacement band.
What matters before you buy
Compatibility is the big checkpoint here. The product page lists multiple compatible Garmin models, and also clearly excludes Garmin Forerunner 570 47mm.
Before ordering, double-check two things:
- Your watch model matches one of the listed compatibles.
- Your Forerunner 570 size is the 42mm version (since 47mm is explicitly not supported).
Also, since the band is offered in multiple colours, it’s worth picking a colour you’ll genuinely wear regularly—replacement straps only feel “worth it” when you’ll actually swap them in.
Tech specs
- Type: Replacement sport watch strap
- Size: 20mm
- Material: TPU (silicone-style)
- Fit/closure: New band clasp design with more secure locking
- Compatibility note: Not for Garmin Forerunner 570 47mm
- Listed compatible models include: Garmin Approach S50/S44/S42/S40/S12/J1, Garmin Forerunner 55/158/165/165 Music/245/245 Music/645/645 Music/570 (42mm)
Buying verdict
You should buy it if you’re looking for a straightforward 20mm replacement band for a compatible Garmin Approach/Forerunner listed in the description, especially if comfort and day-to-day security matter during training and outdoor use.
You may want to skip it if you own the Garmin Forerunner 570 in the 47mm size, or if you need a strap with features beyond basic breathable sport comfort and a secure clasp (in that case, a different kind of band may fit better).
It’s a solid, practical choice for people who just want their watch to feel right again—without turning the strap purchase into a research project.
Mini FAQ
Is this strap only for running?
No. The listing frames it for running, cycling, climbing, walking, camping, travelling, outdoor activities, plus everyday life and office use.
Is it waterproof?
The material description says the strap is waterproof (alongside being dust-proof), so it’s designed with real-world mess in mind.
Can I use it with Garmin Forerunner 570 47mm?
No. The listing specifically says it’s not for Garmin Forerunner 570 47mm.
How easy is it to remove and fit?
The listing says it’s an easy, direct installation and removal with a single button.
Does it come in different colours?
Yes, the strap is available in multiple rich and muted colours, intended to let you match your outfit and mood.