Big double pockets: Convenient place your cellphone、earphone、cable、charger、keys、ID cards、wallet, and other accessories.Waterproof, durable, elastic band can be adjusted to wear comfortable, sweat-absorbent and breathable, very suitable for sports and a variety of outdoor activities.High Quality and Double Zippers, Fashion, Safe, Sturdy, also Suit for Using Earphones. This Bag is Suitable for unisex, both men and women, youth, girls and boys. Material: Polyester Size S: 13.0*7.5*3.5cm Size:M:15.0*9.0*5.0cm Size L:17.0*11.0*5.0cm