BYISYUE 22mm Silicone Watch Strap (sport replacement band) for Xiaomi Watch S4 47mm, S3/S2/S1 & Realme Watch models

The essentials

If your watch strap is looking tired, or you simply want a different look for workouts versus everyday wear, this BYISYUE replacement band is built for that exact kind of swap. It’s a 22mm silicone sport strap designed to fit a range of Xiaomi Watch and Realme Watch models listed by the brand, so you’re not locked into one strap style.

On paper it ticks the usual boxes people care about with active wear: soft feel, lightweight comfort, and silicone/TPU materials that are positioned as dustproof and waterproof for day-to-day handling. It also uses a more secure strap clasp design, which is the sort of detail that matters when you’re moving about and don’t want the band to feel loose.

That said, the fit is the main thing to get right. There’s a clear note that this band is not for Xiaomi Watch S4 41mm, so double-check your watch model and case size before ordering.

What it’s for (and what you’ll notice)

This is a sport replacement strap aimed at active use—running, cycling, climbing, hiking, camping, travel, and regular daily wear. In practice, silicone straps tend to feel different from leather or metal: they’re usually less “fussy” about sweat and they sit comfortably even when you’re on the move.

A small but practical detail is the one-button removal and direct installation. If you like changing straps quickly (for example, a darker colour for commuting and a brighter one for the gym), that ease can make the band feel more “usable” than replacement straps that require fiddly steps.

Key features that matter

The band is made from TPU silicone, described as durable, dustproof and waterproof, while still aiming to stay soft and lightweight. For most people buying a sport strap, that balance—comfort without feeling flimsy—is the core of the decision.

The clasp design is also positioned as more secure locking, with the goal of preventing the watch from falling off if the strap loosens. Again, not something you’ll fully test at home for long, but it’s a relevant design intention for anyone wearing their watch during exercise.

Colours are another area where this strap is meant to help: there are “rich and discreet” options, so you can match outfits or switch your mood without buying an entirely new smartwatch.

Fit & compatibility: the part you shouldn’t skim

This strap is listed as a compatible 22mm band for multiple watches, including Xiaomi Watch S4 47mm and several other Xiaomi models (and Realme Watch models such as Watch 5, 3 Pro, 3, 2, 2 Pro, S2, S and S Pro).

Important limitation: it is explicitly not for Xiaomi Watch S4 41mm. If you have the smaller case size, you’ll need a different strap width/fit—this one won’t match.

It makes sense if you already own one of the listed watches and your strap has become scratched, stretched, or just doesn’t suit your current routine. It might not suit you if you’re unsure of the exact model variant (or if you’re buying as a “generic” strap without checking the watch size).

Care and everyday wear

Since the strap is described as waterproof and dustproof, it’s likely intended for workouts and outdoor days where you’d want less stress about sweat and grime. For day-to-day use, that means it should be reasonably straightforward to keep looking decent—especially compared with strap materials that need more careful handling.

One realistic caveat: silicone/TPU straps can still pick up everyday marks over time, and the look can change with heavy use. If you expect it to stay showroom-new forever, no sport strap truly does—this is more about practical wear than perfect appearance.

Who it suits (and who should look elsewhere)

It’s a solid pick if you want a comfortable sport replacement strap with an easy swap design and you’re focused on getting back to secure, daily wear. It suits people who train regularly, commute with their watch on, or simply like having more than one strap option for different outfits.

It might not be the best match if you specifically need a strap for the Xiaomi Watch S4 41mm (this one isn’t for that), or if your priority is an exact “premium” look and finish rather than a functional silicone sport band.

Mini FAQ

Could this strap be used for workouts and outdoor activities?

Yes, that’s exactly the use case it’s described for, including running, cycling, hiking and other outdoor activities.

Is it definitely the right size?

It’s a 22mm band, and it’s listed for specific Xiaomi and Realme models. The compatibility note says it’s not for Xiaomi Watch S4 41mm, so check your model carefully.

How easy is it to swap the strap?

The description states it’s easy and direct to install, with one-button removal.

Is it waterproof?

The material is described as waterproof, with an aim to handle everyday sweat and outdoor conditions.

Is it worth buying a replacement strap instead of replacing the watch?

If your watch itself works fine and the strap is the weak link, a replacement band like this is often the more practical route—especially when you want a sport-friendly feel and the option to choose a colour.

Final verdict

Should you buy it? Buy it if you’ve got a compatible Xiaomi Watch S4 47mm (or one of the other listed Xiaomi/Realme models), you want a 22mm silicone sport replacement band, and you value comfort plus a strap clasp design intended to stay secure. It’s also a good choice if you like changing colours for different outfits or activities.

Skip it if your watch is Xiaomi Watch S4 41mm, because this specific strap is not for that size. And if your main goal is a more “dressy” strap look rather than a practical sport band, you may prefer a different material category altogether.