High quality material:This replacement strap is made of premium silicone material.soft but durable with delicate detail. The moderate softness makes you very comfortable in not only daily wear.but also in outdoor sportsEasy install and adjust:This watch band is easy to install.remove or adjust the size.you can personalize your 230/235/620/630/735XT with this stylish band easily with the screwdrivers providedFashionable look:Cooperated with black color on rim or back features simple and elegant look. Quite fit for sport style and daily wear.the striking colors makes it attractive and fashionable.it is a good choice for sportsSize:Fit for 6.69″-8.26″ (170mm-210mm) wrist. And it is very convenient to adjust the length to a proper fit for your wrist.the quick release design makes it easy to wear.more flexible and lighterthis watch band will lock onto your watch securely and tightlyGuarantee:We offer 12 month no reason ask refund and a lifetime warranty. if you have any problem with the item you receive or any opinion. please don’t hesitate to contact us. we will find the best solution to solve your problem