Turn your backcountry bed into a cozy abode even in colder weather. The Eagle's Nest Outfitters Ember Underquilt surrounds your hammock to protect you from the chilly air aroundFINE you. It has a universal fit that makes it compatible with any backpack or camp-style hammock. By providing insulation under you and on the sides, the Underquilt provides a barrier to keep cold air out and warm air in.