The upper windproof, lightweight and soft Softex®NIUS LT material with Rip-stop and DWR treatment. Goose down EU 600 Cuin/oz. Low weight, High thermal insulation, Very good packability. Wider mummy fit inspired by models of higher Series. H chamber construction reduces cold spots. Two-way zipper ensures both sides (from top and bottom) sleeping bag release. Left or right zipper can be connected together. New specially developed close-fitting hood shape protects head and face from cold. New collar and drawcord design allow for easy adjustment of the upper perimeter size to suit your needs. Cord locks ensure the single-hand regulation of the hood and collar width. Special interior insulated flap underlaying the zipper prevents from warmth escape through zipper and prevents zipper from getting jammed in to the fabric. Small inner pocket for necessities. New "Alpha foot box" bottom shape - beveled trapezoid contours the shape of freely dropped feet when sleeping on your back and enhances comfort. Storage bag and waterproof compress bag included 170cm sleeping bags models are designed especially for ladies, keeping in mind woman body anatomy and physiology. 170cm model contains the same weight of down filling as 190 cm model, resulting in 170cm model having higher warmth comfort.