The comfort mummy fit of this 34176f1176c rated bag offers room to move while remaining thermally efficient it also features our exclusive welded lamina construction that maximises loft and eliminates cold spots caused by traditional stitching soft polyester lining wicks away moisture and lightweight nylon shell repels water full length zipper has double sliders for ventilation materials insulation thermal q 60 gram bag shell lamina revamp ripstop bag fill type synthetic measurem