Kokatat's Outercore Women's Long Sleeve Shirt has four–way stretch fabric for excellent fit, and flat-stitched seams prevent chafing. This liner is the warmest, driest, and lightest available, and its also more windproof than any other liner. Polartec designed the Power Dry liner to work specially with Gore Tex suits for kayakers. While paddling hard you can generate a lot of sweat. The Power Dry Material actively pulls moisture away from your skin by combining two layers of material bonded together. The outer woven material pulls moisture away from the inner fuzzy fleece layer keeping your skin drier and safer than any other insulation on the market. Silver yarns provide permanent odor protection by inhibiting the growth of odor-causing bacteria. It's also recycled, it's made of 65% recycled material, using this fabric saves 0.2 gallons of gasoline and reduces 7.8 Lbs of CO2 per yard!