Sierra Designs Nitro 30 Sleeping Bag: 30 Degree Down

Sierra Designs made the Mens Nitro 30 Degree Down Sleeping Bag with Flex construction to help it hug your body and provide excellent thermal insulation while still letting you move freely. The high-loft 800-fill down provides lots of warmth for very little weight, and Sierra Designs further shaved ounces by using a half-length zipper. The Nitro Sleeping Bag comes with a footbox vent to help you cool down when you find yourself camping in warmer temperatures than you expected.