The Therm-a-Rest Ohm 20 Degree Down Sleeping Bag sets the standard for high-performance outdoor equipment with its warm build, Nikwax hydrophobic down, semi-rectangular shape, and high utility zipper. Its boxed baffle construction minimizes cold spots and enhances loft. Efficient and compressible Nikwax Hydrophobic insulation boosts warmth without added weight Semi-rectangular shape provides roomy space for accommodating all sleeping postures Full length zipper allows for use as a quilt or custom ventilation Stackable design for creating a large sleeping space Box baffle construction with mesh walls for enhancing loft and eliminating cold spots Compression and storage sack included