The Hydra's Thermagraph® Warm Lining System with Body-Mapped Insulation creates the ultimate do-it-all jacket. Designed with an asymmetrical zipper to reduce chin rub, infiDRY® 20K fabric for ultimate waterproofing and Vader Vents™ to reduce goggle fogging, it's no wonder the Hydra Jacket is our best-selling jacket year after year.