Technical products all start with the materials you put in them, and the Summit bags have the best of the best. 

New ultralight ripstop fabrics by Toray™ improve consistency, give better hand feel, & reduce down leakage while still adding durability. HyperDry™ 800 fill power hydrophobic down has been both certified and RDS sourced so you have complete confidence in your bag's sustainability & responsibility towards the planet.

These materials are then carefully sewn into our upgraded baffle system to keep down from shifting while allowing for maximum loft. Our new differential cut will prevent down from getting compressed from the inside when you crawl inside your bag. This all adds up to more comfort for you, giving you more warmth and room.

Other updates include: increased depth & volume in the head area, dialed in baffle height for better loft, slightly more room throughout, an anatomically tapered footbox for more comfort, & an anti-snag ribbon behind the anti-snag YKK zipper.