Product Description Thank you for looking. This is a Rab Ultrasphere 4.5 sleeping mat (regular size). It has not been unfolded or used since purchase. [Features & Appeal] Ultra-lightweight & Compact: Weighs only about 370g. The packed size is also very small, making it ideal for UL (ultra-light) camping and mountaineering. High Insulation: R-value of 4.3. With "TILT" heat reflection technology, it's warm enough for spring to autumn, and even for low-mountain winter camping. Comfortable Sleep: 8cm thick. The two-layer structure provides a comfortable sleeping surface that minimizes the feeling of uneven ground. Included: Comes with a pump sack, stuff sack, and repair kit. [Specifications] Size: Regular (183cm x 51cm) Thickness: 8cm Weight: Approx. 370g R-value: 4.3 (ASTM) Color: Dark Pewter (Gray) [Product Condition] New and unused. If you are looking for a lightweight mat, please consider this for your tent camping this season! Ultralight UL Yamatomichi