Size Details: our swim cap with chin strap adopts about 2.5 mm/ 0.1 inches thick fabric, thoughtful to fit the curve line of your head and face, providing you with nice wearing , enjoy your happy diving time under the sea Reliable for a Long Time Use: this neoprene swim cap is made of stretchy neoprene and nylon material, reliable and not easy to deform, elastic and comfortable, it can add warmth and cover to your delicate head perfect Helper : these neoprene swim caps keep your hairstyle neat when you're diving, snorkeling, swimming, kayaking on vacation, no worries of hair flowing or messy, save your time and energy Functional Strap Design: this surf hood is designed with flat lock stitching for comfort, reduce drag in the water, keep you warm underwater; Chin strap design will keep your cap stable, you can also adjust tightness Applicable Occasions: this wetsuit hood is suitable for swimming, diving, snorkeling, kayaking, fishing, surfing, sailing, canoeing, and more, swimming cap is not fully waterproof, you also need to match with your other diving gears Colour:black Material:Nylon + Neoprene Size:2.5mm Package Contents: 1 x Diving Hood Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.