These quilts are a thru-hikers dream. Constructed with 12 denier nylon ExtremeLite shell fabric, a 10D tafetta liner and 850+ fill down.Top quilts are designed with a set of adjustable and removable pad straps that are compatible with any backpacking sleeping pad - the straps can also be removed. Other features include a sewn through footbox and an insulated draft yoke with elastic closure for maximum heat retention.Because the AstraLite is hoodless, it is important to pack adequate head insulation. AstraLite users should consider bringing a hooded puffy along if temperatures are likely to dip below freezing. This quilt is designed to be used with an insulated sleeping pad. If you sleeping pad is uninsulated or poorly insulated these products will sleep much colder than intended.