If you feel the cold in your hands while in the sea then mittens are for you. Keeping all your fingers together increases the warmth dramatically especially when you look at the thickness of these gloves this will they are going to keep you warm on the coldest of days. If you can deal with a bit less flexibility in your fingers for the compromise of warmth these are the the gloves for you. , 5mm Thick, Smooth Skin Exterior, 100% Sealed, Shark Skin Grip on palm, Glued and Blindstitched Seams,