Thermarest Backpacking Sleeping Bags Parsec Sleeping Bag 32F/0C Larch Regular 11393. Just like an alpinist precisely selects his rack or a skier carefully chooses her line we took the time to dial in the small details that create comfort and security in the mountains. After you break camp the mummy-style bag uses a compression sack to easily fit into your pack without weighing you down. Designed with high-quality materials and Therm-a-Rest performance features like SynergyLink Connectors the Parsec easily handles three-season bivys and long pushes into the backcountry. Bottom line those that need their sleeping bag to go further choose the Parsec.