Designed for use with a sleeping pad, the ALPS Mountaineering Radiance Quilt is generously sized for adventurers who prefer ample room to accommodate multiple sleeping positions or who need more space than that offered by standard-size quilts and sleeping bags. Constructed of a nylon ripstop shell, the Radiance Quilt earns a 35 F temperature rating courtesy of its TechLoft Micro insulation fill. For cold nights, the quilt can be closed at the top with an adjustable drawstring to minimize drafts. Given the Radiance Quilts ample proportions, this model is perfect to use in extremely cold weather as an over-quilt in combination with a conventional mummy sleeping bag. Included with the Radiance Quilt is an adjustable retention system. This allows the quilt to be secured to a sleeping pad, preventing accidental uncovering when turning over or slipping off the pad when sleeping on uneven ground.