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Long praised as the only bag you need from -20° to 40° Fahrenheit, Sonic™ gets updated for even greater warmth retention and tuneability-while incorporating 100% recycled, bluesign® certified materials for sustainability and stewardship. Updated Thermo Gills™, Toester™ footbox, and over-stuffed with 100% 800FP RDS certified, hydrophobic down, Sonic™ is fine-tuned for frigid weather and environmentally conscious adventure.
Features • New Thermo Gills™: Updated design with a multi-stage zipper system allows for an even wider temperature range and fine tuned heat regulation • Chevron Baffles: New chevron baffle construction better compartmentalizes down for more uniform loft and to eliminate insulation migration • Toester™ Footbox: Keeps your feet warmer, protects against tent wall condensation, and protects down from moisture while drying damp clothes in the footbox • Chogori™ Mountaineering Tent • Tensor™ Alpine Insulated Sleeping Pad