For traveling light in summer, the ultra light and compressible 40F Marmot Always Summer 650FP Down Mummy Sleeping Bag provides reliable transport to dreamland. Even though its just over two packable pounds, it doesnt skimp on features. Feely draw cords, water resistant 650 fill power down, trapezoidal foot box with a heater pocket, and the included compression stuff and storage sack all add up to some seriously plush woodland digs. Insulated with certified 650 fill power down with Down Defender to improve water resistance in wet conditions. Shell is 30d 100% nylon ripstop DWR 1.5 ozsq. yd. Lining is 30d 100% nylon DWR 1.27 oz.yd. Anatomically designed footbox with wrap around construction increases warmth. Full Length locking YKK two way zipper with anti snag slider and zip guard reduces fabric snagging. EN Tested: Comfort: 40.8F 4.9C Lower Limit: 31.6F 0.2C Extreme: 3.6F 15.8C Nautilus multi baffle hood. Internal stash pocket and heater pocket in footbox. Snagless insulated draft tube. Ground level side seams. Hood draw cord. Zipper garage. Stretch tricot baffles. Two hang loops. Stuff and storage sack included.