Material: These swimming caps are made from a PU coating and 100D polyester for excellent breathability and optimal fit. (The swimming cap has a slight smell, please put it in a ventilated place after you receive it) Hair protection: Extra space allows long hair to be tucked inside to protect your hair better, neither while swimming nor underwater. Stretchable waist: The stretchy fabric allows this swimming cap to easily stretch for an optimal fit. Both men and women can use it comfortably, suitable for different head circumferences. Swimming caps are ideal for thalassotherapy, water aerobics and all water sports. < p>Packaging: 2pcs swimming pool swim cap for adult, enough quantity can meet your daily needs.