Sharkskin Chillproof Heavy Duty Gloves are similar to normal Chillproof but have been reinforced on the inside of thumb and forefinger top. 

Sharkskin Chillproof HD Gloves are a combination of Amara on the palm and the Sharkskin Chillproof material for the remaining part of the glove. The Sharkskin Chillproof material is perfect for providing warmth and feel while still being thin and flexible. Chillproof material consists of three different layers and dries really fast.