The Aleutian is a twenty-degree mummy bag with Heatshield Optimal Technology SL insulation.
Sizes: Regular Right Zip, Long Right Zip Average Total Weight: [reg] 3 lbs 6 oz (1545 g) [lng] 3 lbs 10 oz (1650 g) Stuff sack Size: 8 " x 17" (20 cm x 43 cm) Max User Height: [reg] 6'0" (183 cm) [lng] 6'6" (198 cm) Hip Circumference: [reg] 58" (147 cm) [lng] 60" (152 cm) Shell Fabric: 100% polyester Enduralite	Temperature Rating: 20 degrees F/-7 degrees C Fill Weight: [reg] 2 lbs 1 oz (930 g) [lng] 2 lbs 3 oz (1005 g) External Length: [reg] 84" (213 cm) [lng] 90" (228 cm) Shoulder Circumference: [reg] 62" (157 cm) [lng] 64" (163 cm) Foot Circumference: [reg] 40" (102 cm) [lng] 40" (102 cm)
Features: Twenty-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.