Main Features:High elasticity,product cause no ligature marks on headProduct has high air permeability,and is suitable for temperature no matter high or lowThe nylon fabric is thin and smooth,giving your more comfortable wearing experienceHigh quality and workmanship that interior stitches is excellentThe exterior is flat,simply and elegantSpecification:Material:nylonColor:Random deliverySize:20x14cmNote:Due to the difference between different monitors,the picture may not reflect the actual color of the item.We guarantee the style is the same as shown in the picturesDue to personal measurement technique is different,there may be 0.1-1cm error of the physical.Thank you!Package Included:1xSwimming capPacked Safely in Bubble Bag.