The material of this kettle cover is Oxford cloth. A glass that can hold up to 40oz of water. Used for walking, running, gym, cycling, hiking, and more. Equipped with two zippered pockets, it can store smartphones, cash, card keys, and other small items. Equipped with adjustable shoulder and shoulder straps, suitable for all body types, you can hang it on the shoulder, cross the chest as a sling bag, or just hold it by hand. Can customize your logo and pattern.