During summer when you car camp in Pennsylvanias national forest, The North Face Allegheny Bx Sleeping Bag gives you a comfy place to bed down. The North Face used Heatshield Optimal Technology HOT SL insulation that compresses well for easy packing yet retains its loft. Unzip this 40-degree, rectangular bag and lie on top while you search the skies for Pegasus and Hercules. Or zip the Allegheny Bx to a second compatible bag to make a bed to share with your sweetheart. Should a storm roll in and cause temps to drop, the zipped-up Allegheny will hold onto your body heat to keep you warm all night.