Boost 650 32focFrom backpacking trips to car camping excursions, the Boost 650 provides the dreamy comfort you need to sleep well outdoors. With an innovative design that allows you to adjust its shape and add warmth when needed, the Boost is one of the most comfortable and versatile sleeping bags ever made. The semi rectangular shape gives you considerably more internal space than a mummy bag you'll feel unrestricted and free to sleep in whatever position you want