Compatible With : All Apple Watch 40mm/38mm Series 1234Mifan Premium Nylon Band for Apple Watch 40/38mm Loop Strap is made of premium soft breathable woven nylon material and high quality hardware .The double-layer nylon weave has dense loops on the skin side that provide most soft comfortable feel while allowing moisture and humidity to get through quickly . The attachment loops on the other side are easily lock /unlock for superior durability and security. The unique colors make the whole range bands quite an excellent replacement for daily wearing in all different occasions .Features:- Premium soft breathable woven nylon material for comfortable use.- Specifically made for activities in any weather or moisture condition .- Daily water and sweat proof . Anti humidity and moisture.- Durable velcro hook and loop for secure lock/unlock - New design for easy quick adjustment and fastening.- Wrist circumference 145mm to 210mm- Original design for all 40mm/38mm Apple Watch Series 1234Maintenance : Avoid using it in water to maximize its service life.