We don"t need to tell you that indoor pool training doesn"t necessarily cross over to podium results in the open water. And if you"re racing in cold water, like Alcatraz, this is especially true. For these reasons, Blueseventy created its Skull Cap. Constructed from 3mm Yamamoto Neoprene (the same neoprene found in its Reaction wetsuit), the Skull Cap provides all of the hydrodynamics, warmth, and comfort that"s found in a wetsuit. In terms of fit, Blueseventy incorporated a flexible central panel along the top of the head. And as a result, the Skull Cap is conforming to most head shapes and sizes. Securing this fit, the cap extends over the ears and down into an integrated chin strap. This piece is soft and malleable, providing exceptional fit without inducing abrasion. The Blueseventy Skull Cap is available in the color Black/blue and in the sizes Small, Medium, and Large. Product FeaturesMaterial: [cap] Yamamoto neopreneRecommended Use: triathlonManufacturer Warranty: 1 year