The size of the case is 9*5.5*5cm,the towel size is 80*30cm. Quick Dry Towel is made of breathable microfiber( 80% Polyester+20% cotton) , case is made of environmental food grade silicone and Metal Carabiner. The design of silicone shell and metal carabiner makes it very easy to carry and accept, and wear-resistant. It is very portable. You can put it in your bag( handbag, packpack and all kinds of bag, also you can hang it on anywhere you want, perfect for when you travel, Hiking , Camping, or Running, Indoor Exercising, any outdoor activity.