Therm-a-Rest LuxuryLite UltraLite Cot Cot's patented BowFrame design eliminates painful crossbars and squeaky joints. The lightest cot on the market - so light even backpackers carry it. Compact design fits easily in a pannier, portage bag or backpack. Cot stands up to heavy use; waterproof, stretch-free nylon cover, anodized aluminum poles and lightweight nylon feet. Assembles quickly and easily - no tools required.