This is the Sharkskin Watersports Gloves HD for Scuba Diving, Snorkel etc.Features: HD stands for heavy duty. As well as Chillproof back of hand for warmth this glove has a 2-layer amara palm and extra reinforcing on the inside of the thumb and over the top of the forefinger. Perfect for handling ropes, intense jigging for fish, and other water sports activities where you want extra protection from abrasion as well as the cold. "