The Neo Air Mattress represents the worlds most advanced engineering in ultralight comfort, "e Thermarest. Beyond being the lightest air mattress available, Thermarest have utilised two patent-pending internal technologies, making it up to three times warmer & more stable than any other uninsulated air mattress available. Packed into your kit it is no bigger than a one litre water bottle. Revolutionary by design, the gossamer Neo Air Mattress makes comfort one less thing youll need to compromise when travelling fast & light. The Neo Air Mattress offers unrivalled warmth using a reflective barrier that returns warmth to the body & reduces heat loss to the ground keeping you three times warmer than any other uninsulated air mattress. When inflated, patent-pending Triangular Core Matrix technology creates an internal truss system resulting in a stable mattress.