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SONIC™ 0 LONG DOWN SLEEPING BAG
AWARD WINNING COMFORT BASECAMP TO SUMMIT
The 2015 Backpacker Editors’ Choice Award Winning Sonic™ series of sleeping bags are built to put a smile on your face when the cold weather is keeping most people out of the mountains. We’ve used all the best ingredients of high-end fabrics and 850 fill power down insulation paired with stretch construction at the knees for side sleeping. Thermo Gills™ regulate the internal temperature of the bag by as much as 20° F without letting drafts in.