Convert a packed 87" × 30" night shelter into an 87" × 60" daytime cover using a single front zipper. This hollow-cotton sleeping system eliminates overnight gear changes by providing direct cross-ventilation on humid nights and dense thermal retention when seasonal temperatures fall. Designed for spring through winter field use, the envelope maintains a comfortable sleep threshold of 15°C (59°F), drops to a usable limit of -4°C (24.8°F), and reaches a survival floor of -18°C (0°F).
A technical 190T nylon outer shell resists scuffs and light moisture against rough terrain, while a brushed 190T pongee inner liner reduces friction against everyday sleepwear. The middle layer relies on loose-fill hollow cotton that traps ambient heat without compressing flat under body weight. Maintenance stays simple: machine wash the full bag on a gentle cycle and tumble dry low to restore initial loft.
Weighing roughly 4 lbs, the package clears standard vehicle cargo floors and tents without crowding living space. Fold or roll the zipped envelope downward until it slides into the attached compression stuff sack, tightening the integrated cords to reduce bulk for shelf organization or road trips. The continuous zipper track also permits two identical bags to zip together for tandem sleeping arrangements.
