SLEEPING BAG - TRAVERSE SYNTHETIC REGULAR - -21 deg - STSWhether you hike through snow to sleep in an alpine hut or camp out after a summer storm, the Traverse wont let you down. Our unique WaveLoft construction uses thick layers of THERMOLITE insulation looped together to gain extra loft and trap pockets of warm air, providing increased warmth in colder conditions. The baffle construction also eliminates the frustration of getting tangled in loose lining as all lining fabrics are attached to the shell