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. Unique Adjustable Design: Seam is -resistant than flat lock seam, because it glued together the material before stitched up. Chin belt allows you take on and hat , and adjust belt for comfortable wearing. It is quick-drying, which also can effectively protect your head from sunlight, wind, scratches, etc Effectively Protecting Your Head: 2.5mm diving hood makes your head will be protected when wearing the diving hood. And keep your head warm in cold waterIt, it can shield your head from sea lice, jellies and coral. The 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. Material: Nylon + Neoprene colour: blue Package Contents: 1 x Diving Hood Only the above package content, other products are not included. Note: Light reflection 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.