Pertex® Quantum uses a tightly woven structure to provide a light and soft fabric that allows insulation to fully loft while also being quiet, windproof, lightweight and packable.
Pertex® Y Fuse fabrics use yarns with unique Y shaped filaments. These filaments create a tightly interlocking structure which improves downproof and water beading properties. The interlocking structure of Y Fuse fabrics remains highly stable over extended wash and wear cycles.
Super DWR is a water repellent finish that maintains its high performance through extended wash and wear cycles.
HyperDRY™ water resistant down is treated with a unique Fluorocarbon Free treatment that adheres to the down cluster that allows down to retain its superior warmth to weight ratio - even when wet.
Responsible Down Standard (RDS)
All down products from Stone Glacier come from an RDS Certified Supplier. We only use down that comes from ducks & geese that were treated ethically.
Like it’s partner jacket, the Grumman Goose Down Pant was strategically designed to reduce weight and maximize packability for backcountry hunts. We have found down pants to be a game-changing piece of gear in adverse conditions. However, many of the products we have used did not pack well or were nearly impossible to take on and off in the field. Thus, they frequently got left at home. We set out to create a pant with a full-length zip that could pack small enough to remain virtually unnoticed in the pack until used. With 850+ fill power, HyperDRY™ down insulation and a Pertex® Quantum shell textile these pants provide an unbelievable warmth to weight ratio. Add a real full-length side-zip that can be completely opened up at the waist hem and cuff and you now have a truly functional down insulated bottom. Use these once for a long glassing session on top of the mountain, and you’ll never again leave home without them.