Description When you need feature-packed comfort for frigid backcountry conditions, it’s time to pack the Questar 0F/-18C. We've loaded this bag with the comfort features that Therm-a-Rest bags are known for. Our SynergyLink Connectors integrate the bag with your sleeping pad while allowing our Zoned Insulation to keep fill where you need it most. The fit of the bag has been perfected in our onsite cold chamber to create our W.A.R.M. fit that allows room for multiple sleep positions without compromising thermal efficiency. Stuffed with water-resistant 650 fill Nikwax Hydrophobic Down certified by the Responsible Down Standard, the four-season Questar is ready for your next backcountry adventure. The Questar is offered in three sizes, and designed to fit both men and women. Compression sack and storage sack included. Features Hydrophobic 650 Nikwax Hydrophobic Down™: absorbs 90% less moisture and dries 3 times faster, without harmful perfluorinated compounds (PFCs). "W.A.R.M." cut: W.A.R.M. comfort ("with extra volume for multiple positions") means you can choose a variety of natural sleeping positions while maintaining the bag's thermal efficiency. SynergyLink™ Connectors: Connection to the mattress for optimized efficiency and comfort (removable for versatility). Zone Insulation: Maximizes warmth and optimizes weight by precisely distributing fill where it's needed most. Interior partitioning: Mesh partitions to maximize loft and minimize cold spots. Toe-asis™ foot warmer section: Ergonomic foot warmer section to quickly warm chilled feet with a warm down cocoon. Comforter and blanket loops: tailor your sleeping system to the conditions by adding our technical comforters or blankets to the sleeping bag for extra warmth. Responsible Down Standard: guarantees that the birds from which the down is derived are treated humanely. Additional features: flange to block heat loss, full-length zipper protection flap, anti-lock zipper, drawstring hood and exterior zippered pocket. Compression bag and storage bag included. Specifications Weight: 1.21kg Recommended Temperature Comfort: -10°C Recommended Temperature Limit: -18°C Fill Power: 650 Fill Weight: 820g Maximum user height: 183cm Thermarest Questar -18C Down Sleeping Bag