Experience superior comfort and warmth through the night with the Copper River Rectangle 40˚F Sleeping Bag. Nearly 4 lbs. of four-chamber polyester hollow-fiber insulation traps heat to keep you warm when the temperature dips. The water-resistant 210T polyester-ripstop shell protects from moisture, and the lightweight 210T polyester-taffeta liner offers all-night comfort. Warm single-layer construction. No. 8 anti-snag coil zipper with insulated baffle. Imported.