All Coleman sleeping bags are designed with ComfortSmart technology to keep you comfortable. The Colossals ComfortSmart features include: ZipPlow which plows fabric away from the zipper to prevent snags, Comfort Cuff which surrounds your face with softness, Roll Control which locks the bag in place for easier rolling, Fiberlock which prevents insulation from shifting and increases durability, Thermlock which reduces heat loss through the zipper thereby keeping you warmer, Zipper Glide tailoring which allows smooth zipper operation around the corner, and the WrapNRoll carrier which is attached so packing is easy.

For a 3 season sleeping bag it is best to buy for cold. Its a safe bet that on at least one of your adventures, the nighttime temperature will drop unexpectedly. Thats why its smart to buy a bag thats rated for the lowest possible temperature you expect to face on your camping and backpacking trips. For summer trips, a bag rated at +35 degrees or higher will likely do the trick. If you like to camp in higher elevations in the summer, or if spring and fall outings are in your future, consider bags rated from +10 to +35. Winter adventurers should look for bags in the -10 to +10 range, while those on serious winter alpine climbs and expeditions will want a bag rated lower than 10.