Unique Lamina construction maximizes the loft of your insulation, eliminates cold spots and now comes thermally mapped to put insulation where you need it most. By strategically placing insulation, we are to able to concentrate warmth where you need it most - around your core and feet. The comfort mummy fit of this 22°F/-6°C-rated bag offers room to move while remaining thermally efficient. It also features a draft collar and our exclusice welded Lamina construction that maximizes loft and eliminates cold spots caused by traditional stitching. Soft polyester lining wicks awway moisture and lightweight nylon shell repels water. Full-length zipper had double sliders for ventilation.