Whether you're on an overnight snowshoe or ski tour or just a quiet off-season backpacking trip, the Parsec 0F/-18C sleeping bag offers plenty of warmth for winter activities. Filled with highly compressible 800-fill Nikwax Hydrophobic Down, which absorbs 90% less water and dries 3x faster than untreated down, the Parsec keeps you warm and dry even in wet conditions.The ultra-lightweight 20-denier GRS-certified nylon shell is a smart choice to save weight, while the new, jam-free YKK zip prevents wear and tear and makes it easy to get in and out. Improved - and optional - SynergyLink connectors, which attach to the sleeping pad, keep the sleeping bag in place and increase comfort and warmth. An improved shape saves up to 2 ounces over the previous version, while the shoulder section is slightly wider to accommodate more layers of clothing. Cold feet in the depths of winter? no chance, because the down-lined Toe-asis foot pocket keeps your feet cosy and warm all night long.SynergyLink ConnectorsBy integrating the mat and sleeping bag, the SynergyLink Connectors ensure that you don't roll off the mat while sleeping - without constricting.