Warm, windproof, water-resistant; Matterhorn Hybrid Jacket uses incredibly lightweight and highly compressible 60-g Thisulate wrapped in a 100% recycled polyester shell and lining. Works great as a insulation layer or as a stand alone jacket. Material: Polyamide Ripstop Insulation: 60g Thinsulate Sizes: 2XS - 2XL >>Information to our customers in California (California Proposition 65).