thérmē hybrid sleeping bag / Underquilt

The thérmē hybrid sleeping bag was designed around some key principles: I wanted it to be multi-use, innovative, and of sound, practical design. This innovative system is indicative of its name thérmē (Greek for “heat”). I wanted a lightweight bag that was also thermally efficient. I accomplished this with a system of hybrid insulation, combining high-quality down with an fully integrated and breathable reflective layer. "Patent Pending"  It effectively keeps out wind and cold, conserving heat by reflecting infrared radiation given off by the occupant and containing other heat loss in the baffled down fill. This combination keeps you very warm. The thérmē is flexible in other ways as well. It quickly converts from an envelope-style bag to a mummy-style using four built-in side loops, doubling the insulation around feet and legs. This conversion is perfect for smaller individuals or people who prefer more warmth in the lower section. Unlike other down bags, the thérmē also has a built