Western Mountaineering gave the MegaLite Sleeping Bag a roomy cut for those who want an ultralight bag without the coffin-like feeling. This down bag features insanely lightweight 850-fill goose down and will lull you to sleep on your warm summer backpacking trips and multi-day bike excursions. The bag's continuous baffle system let you sweep the down to the top or bottom of the bag to suit the night's temps, and the full-length draft tube keeps the chills from sneaking in.