Keep the cold out and the warmth in with this2L Octa Down Neck Warmer by Snow Peak. The outer material is made of recycled polyester with a double ripstop composition, while theback side is laminated with a polyurethane waterproof membrane, making it breathable and waterproof. The lining'sOcta fabricis heat-insulating, sweat-wicking and quick-drying, and is extremely lightweight. Snow Peak 2L Octa Down Neck Warmer -Shell: 100% Recycled Polyester -Lining: 100% Polyester(51% Recycled, Teijin Octa® ) - Waterproof membrane - Adjustable - Rubber band in pocket for easy carrying - Heat-insulating, sweat-wicking &quick-drying. Colour: black