Giro Proof Winter Gloves. When there's a Polar chill in the air you need no nonsense warmth at and on your fingertips. Giro Proof Winter gloves were designed to keep your hands snug and nimble even in freezing temps. The wind resistant exterior shell has a waterproof, breathable performance Hipora liner and a combination of PrimaLoft and Thinsulate XT S insulation with X Static anti microbial fiber to keep you warm and dry when it matters most. The fleece interior features AGrid technology, which uses a woven grid to hold in heat. Reflective detailing and touch screen capable fingertips help you to be seen, and stay in touch without slowing you down.