ENVIRONMENTAL PROTECTION: The nylon that makes the strap uses a fluffy textile process, so the strap is more comfortable and breathable. In order to ensure the softness of the strap, there is no glue in the production process, and custom stitched with clean lines, so the strap is also more environmentally friendly and will not cause any allergies.SOFT and COMFORTABLE: We use two layers of durable 1.7mm thick nylon to make the 3.4mm thick straps, so they won't cut your wrist even if you wear them too tight. They are so soft and comfortable that they can take on the shape of the curve of your wrist when you first start get them.Fastening: BuckleSOLID CLASP: High-density nylon with state-of-the-art laser cutting technology to ensure every hole and tail of the strap will not fraying. The steel hardware is subtly brushed/satin, is absolutely top notch and belies the price, will not crack, rust, or cause allergies. Matched watch straps beautifully definitely an upgrade on your watch!QUICK RELEASE: Quick release made installation an absolute breeze,simply slide quick release knob with finger, takes just a minute you can finish the installation and remove process, no tools at all.WRIST SIZE: The length of the band is 123mm/80mm(excluding the buckle) , with 8 adjustable holes. Can fit wrists from about 6.3" to about 7.9" around, which will comfortably fit most men and women.