Materials: Food-grade PP bottle (BPA-free) and the sleeve is made of oxford fabric and neoprene with a silicone bottle cap.Design: 200 ml (7 oz) capacity. Fully Adjustable Added hook and loop elastic wrist strap with a strong hoop ensures bottle is secure in your wrist , wont fall off even if youre doing strenuous exercise.Hand free: The wrist water bottle with hand straps and anti-drip sports lock cap, but outdoor activities allows you to be completely hands-free since they wrap around your wrists.Leakproof: The bottle mouth is designed to prevent liquid from spilling during running or strenuous exercise.How to use: bite the silicone mouth lightly or press the spout with fingers, then easy to suck the water out. You dont have to stop when you want to drink water. Quickly and easily stay hydrated during outdoor activities