Volcoms exclusive Thermal Defense System™ or TDS™ creates maximum breathability and insulation through strategic 3-layer construction. By identifying temperate zones within your body, this garment works with you to achieve total thermal comfort. Lightweight packable Thermal Down Panels create heat and keep it inside. Fleece Backed 3 Layer Gore-Tex® fabric regulates warmth, breathability and air circulation. Zippered Venting is used to release heat for a quick cool down system. TDS™ allows you to take on the most epic conditions all day long. It is yet another innovation brought to you by your friends at Volcom. Shoreline Of Tahoe in the battle to keep you warm.