{How to Choose Size }38/40/41mm-S size band fits 5.67-6.14 inches wrist;38/40/41mm-M size band fits 6.14-6.61 inches wrist;38/40/41mm-L size band fits 6.61-7.09 inches wrist. 42/44/45mm-S size band fits 6.14-6.65 inches wrist;42/44/45mm-M size band fits 6.65-7.17 inches wrist;42/44/45mm-L size band fits 7.17-7.112 inches wrist. {Quality Materials} Made of elastic soft nylon,Breathable,Skin-friendly, Lightweight design.Easy to put on and off.Soft and comfortable feeling brings good time all day. {Comfortable Wearing}It's a stretch bracelet solo loop band, No clasps/obuckle design makes it extremely comfortable to wear. It prevents skin irritation and is soft and light.fits snugly without constriction.Makes you feel comfortable to wear in daily life. {Breathable and waterproof} This Stretchy Fabric band has anti-perspiration and water-resistant properties,which Not irritating to your skin when it hot out or sweating, Breathable & durable & washable. {Easy to install and remove} The Watch band is supplied with watch loops at both ends, which snap precisely and securely onto the watch interface. Easy and direct installation and removal of a button. Don't need a tool.