Description of ThermaRest Prolite 4 - Women's - Large All the benefits of the ProLite 4, with added warmth for women. Great for mountaineering, winter camping, backpacking, and multi-day adventures. Features: Extra-Warm : Added insulation in the feet and torso. Specially Sized : A better fit for women’s bodies. Ultralight and Compact : Our easiest mattresses to carry. Weight : 1lb. 10oz. (740g) Rolled Size : 11x5.1in. (28x13cm) R-Value : 4.1 Thickness : 1.5 in. (3.8 cm)