The durable Pounder Plus twenty-five degree sleeping bag delivers reliable synthetic warmth for cool-weather camping, backpacking, river rafting and summer mountaineering.Primaloft SB high loft insulation.A-Flex Lite construction is an advanced shingle insulation system that offers exceptional heat retention and optimal loft and cushioning.Trapezoid foot box matches the shape of your feet.Velcro -free face muff keeps the drawcord and zipper away from your face.