The Allegheny is a forty-degree rectangular sleeping bag with Heatshield Optimal Technology SL insulation.
Sizes: Regular Right Zip, Long Right Zip Average Total Weight: [reg] 2 lbs 8 oz (1120 g) [lng] 2 lbs 11 oz (1205 g) Stuff sack Size: 7 " x 13" (19 cm x 33 cm) Max User Height: [reg] 6'0" (183 cm) [lng] 6'6" (198 cm) Hip Circumference: [reg] 65" (165 cm) [lng] 65" (165 cm) Shell Fabric: 100% polyester Enduralite	Temperature Rating: 40 degrees F/4 degrees C Fill Weight: [reg] 1 lb 1 oz (490 g) [lng] 1 lb 3 oz (530 g) External Length: [reg] 77" (196 cm) [lng] 83" (211 cm) Shoulder Circumference: [reg] 65" (165 cm) [lng] 65" (165 cm) Foot Circumference: [reg] 65" (165 cm) [lng] 65" (165 cm)
Features: Forty-degree mummy bag with Heatshield Optimal Technology™ Overlapping shingle construction SL insulation H.O.T.™ SL synthetic insulation Silky polyester taffeta fabric Full-length draft tube Easy-grab zipper pull tabs Hood and chest adjustable drawcord Lined zipper column External zippered chest pocket	Technology: Heatshield Optimal Technology™ SL Fill: 100% polyester hollow core fibers increase thermal efficiency. Variations in fiber thickness provide softness and high loft. Easily compressed and resists breakdown. H.O.T™ Insulation: H.O.T.™ Insulation is built with 100% polyester hollow-core fibers, H.O.T.™ SL provides powerful thermal efficiency. Because the fibers are of variable thickness, they compress easily, without breaking down, resulting in a bag that's convenient to pack, yet doesn't lose its softness, warmth, or high loft. Overlapping Shingle Construction: Evenly distributes insulation for consistent warmth and uniform loft. Prevents insulation from moving and eliminates cold spots.