Therm-a-Rest Proton Minimalist Camping and Backpacking Blanket All-condition Protection: Waterproof/Breathable shell fabric sheds moisture for added Protection and utility Reliable insulation: Hollow microfiber polyester era loft insulation and reflective Coating inside maintain warmth and loft even when wet Packable: tapered, weight-reducing shape; packs into its own pocket Added comfort: draw cord at bottom edge reduces drafts and Cinches around a mattress to keep the Blanket in place Versatile: Perimeter snap loops mate with another Therm-A-Rest quilt, Blanket, sheet or mattress snap kit