The Columbia Reactor 25 Mummy Sleeping Bag features Omni-Heat thermal reflective lining and Omni-Shield advanced repellency for an unbeatable warm and dry nights sleep. The Columbia Reactor 25 Mummy Sleeping Bag is a three-season bag designed with offset quilt construction for durability and warmth, sleeping pad retention loops and a draft tube. Regular size fits up to 6 ft., long fits up to 6 ft. 6 in.