DESCRIPTION

We’ve updated our Backpacker Editors’ Choice award-winning big-mountain bag, Sonic, for even greater warmth, tuneability, and reduced environmental impact. With this bag, we are launching our next-generation Thermo Gills™ with a new multistage zipper system that dramatically increases the usable temperature range of the bag and allows fine-tuning of comfort from within the bag. Sonic’s new chevron baffle construction better compartmentalizes down, eliminating migration and keeping the down evenly lofted. Not to mention, it looks awesome. In updating the bag's design, we put a high priority on taking a leap forward in sustainability. The shell and liner fabrics are 100% recycled fabrics and bluesign® approved. The premium 800 FP hydrophobic down is 100% Responsible Down Standard (RDS) certified. We also took years of history in the field to make detailed upgrades, including massaging the profile of the bag, redesigning the draft collar, and bolstering the draft tubes. Our proven Toester™ footbox keeps feet warmer, provides a waterproof barrier against tent wall condensation, and protects down from moisture while drying damp clothes inside the footbox. Adaptable to whatever the mountain throws at it, Sonic continues to reverberate as the ultimate extreme weather companion.

FEATURES

Award-winning design is updated for even greater warmth retention and adjustability across temperatures.
Updated design incorporates 100% recycled, bluesign® approved shell and liner fabrics.
Updated Thermo Gills™ extend the comfort range with a new multistage zipper system.
Overstuffed with premium 800 FP hydrophobic down that is PFC-Free and 100% Responsible Down Standard (RDS) certified, ensuring humane treatment and traceability throughout the supply chain.
New chevron baffle construction better compartmentalizes down for more uniform loft and down migration prevention.
Stretch construction at the knees for comfortable side sleeping.
Redesigned draft collar and draft tubes keep cold air out.
Redesigned Toester™ waterproof/breathable footbox utilizes a layer of synthetic insulation to protect the down and deliver maximum toastiness for toes.
Offset zipper creates a thermally efficient seal while an updated profile secures warmth closer to the body.

SPECS

Minimum Weight 3 lb , 9 oz / 1.62 kg
Packed Size 14.0 x 9.5 in dia / 36 x 24 cm dia
Temp Rating 0F / -18C
ISO Comfort 14F / -10C
Fill Type 800 FP Down
Fill Weight 1 lb , 13 oz / 835 g
Fits Up To 6'6" / 198 cm
Shoulder Girth 65 in / 165 cm
Hip Girth 60 in / 153 cm
Knee Girth 55 in / 140 cm
Compressed Volume 9.9
Shell Fabric 100% Recycled Nylon, Bluesign Certified
Footbox Fabric 100% Recycled Nylon, Bluesign Certified
Lining Fabric 100% Recycled Polyester, Bluesign Certified
Color Goodnight Gray / Goldfinch
Zipper Location Left
Stuff Sack Compression stuff sack
Insulation Down