The Outwell Sleepnest Single 10cm is a self-inflating sleeping mat engineered with zoned support and integrated cut-outs to maintain proper spinal alignment throughout the night. Its 3D construction delivers a substantial 10cm profile that effectively insulates you from the ground, whilst the generously sized foam cavities compress efficiently for transport yet fully expand when the Flat High-Flow valve is opened. The TPU (thermoplastic polyurethane) lamination bonds directly to the stretch polyester fabric, eliminating the delamination issues common in adhesive-bonded mats. This advanced construction achieves a weight of just 3.05kg for a 200 x 73cm sleeping surface.