BYISYUE Silicone Watch Strap for Redmi Watch 4/5 & Xiaomi Smart Band 8 Pro/9 Pro
Product description
The essentials
If you’re after a simple way to refresh the look (and feel) of a compatible fitness watch, the BYISYUE silicone sport replacement strap is built for everyday wear and active days. On paper, it’s a TPU silicone-style band aimed at people who want something lightweight, comfortable against the skin, and practical for training, walking and general life.
One small caveat, though: compatibility here is specific. The listing explicitly excludes several “Lite/Active” variants and certain Smart Band models, so it’s worth double-checking your exact watch before you order.
Key points: what it offers in real life
The strap focuses on comfort and usability rather than anything flashy. Silicone/TPU sports bands tend to win on breathability and that “stays put” feel compared with harder materials, and this one is described as being dust-proof and waterproof, which is handy if your routine includes sweat, rain, or outdoors time.

It also comes with a “new design” band clasp, described as locking more securely. In day-to-day terms, that’s the sort of feature you notice on the move—when you’re tightening up before a cycle ride, or when you’re moving a lot during a hike. Nobody wants a loose band you’re constantly adjusting.
In terms of style, BYISYUE offers the strap in many muted, rich colours. That’s useful if you want the same watch but different vibes for work, weekends or workouts.
Where it shines
A few situations where this strap makes sense are pretty clear from the description:


- Sport and outdoor use: The material is framed as suitable for exercise “all day” and for activities like running, cycling, climbing, walking, camping and travelling.
- Daily comfort: It’s described as soft and lightweight, which generally suits long wear.
- Wet-weather practicality: Being labelled waterproof gives some peace of mind for typical puddles, rain and gym sweat.

You could even imagine a practical switch: wear one colour for the office, then swap to a darker shade for training. The listing also mentions installation and removal with a single button, which is the kind of detail that can matter if you actually change bands often.
What to know about compatibility (important)
This is the part to take seriously. The strap is listed as compatible with Redmi Watch 4 and Redmi Watch 5, plus Xiaomi Smart Band 8 Pro and Xiaomi Smart Band 9 Pro.
However, it explicitly says it is not for versions including Redmi Watch 5 Lite, Redmi Watch 5 Active, and also excludes Xiaomi Smart Band 8 / 8 Active / 9 / 9 Active.
If your device is one of those excluded variants, this strap likely won’t fit as intended—so it’s better to avoid relying on “it should be close enough”. It may look similar, but watch band fit can be unforgiving.

Pros
- Soft, lightweight TPU silicone-style strap for comfortable daily wear.
- Described as dust-proof and waterproof, aimed at training and outdoors.
- Colour options can help match different outfits and moods.
- Listing claims a more secure clasp and an easy, single-button swap.
Limitations to keep in mind


- Compatibility is narrow. If you own a “Lite” or “Active” variant (or a non-Pro Smart Band model), the listing suggests this isn’t meant for you.
- It’s positioned as a sport replacement band rather than something premium or dress-focused, so if you want a more formal look/material feel, you may find it leans more casual.
Tech specs

- Name: BYISYUE Watch Strap for Redmi Watch 4/5 & Xiaomi Smart Band 8 Pro/9 Pro
- Type: Silicone sport replacement band
- Material: TPU (silicone-style)
- Water resistance: Waterproof (as described)
- Dust resistance: Dust-proof (as described)
- Fit/locking: New clasp design with a more secure lock (as described)
When it makes sense
It’s worth considering if you want a practical silicone sport strap for a compatible Redmi Watch 4/5 or Xiaomi Smart Band 8 Pro/9 Pro, and you care about comfort during workouts plus basic protection against sweat and light weather.
You should probably skip it if you’re using one of the explicitly excluded variants (Lite/Active, or non-Pro models) or if you’re looking for a strap with a distinctly dressier vibe.
Mini FAQ

Is it good for workouts?
The listing frames it as suitable for training and all-day exercise, and it’s described as waterproof and dust-proof, which fits typical gym/outdoor use.


Will it fit my Redmi Watch 5 Lite or Watch 5 Active?
The description specifically says “NOT for Redmi Watch 5 Lite” and “NOT for Redmi Watch 5 Active”, so it’s better not to assume it will.
Is it easy to change the band?

The listing mentions easy direct installation and removal with a single button, so swapping should be straightforward.
Can I choose different colours?
Yes, it states the strap is available in many rich and muted colours.
Final verdict
Final verdict
Buy the BYISYUE silicone sport replacement strap if your device is one of the listed compatible models (Redmi Watch 4/5 or the Pro versions of Smart Band 8/9) and you want something comfortable, lightweight, and practical for everyday wear and training. Skip it if you’re on one of the excluded “Lite/Active” or non-Pro models—the compatibility notes are clear enough that it’s not a gamble worth taking.
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