With three distinct temperature ratings, the One Bag will help keep you comfortable in a variety of climates. By combining synthetic HEATSEEKER(TM) and 800-fill recycled down insulation, this sleeping bag provides exceptional warmth and versatility wherever you set up camp. 20-Degree Insulation 700 Fill Recycled Down 20-Degree Main Body 20D Recycled Nylon Taffeta With Non-PFC Durable Water-Repellent (Non-PFC DWR) Finish 40-Degree Insulation Heatseeker(TM) Eco Advanced 80% Post-Consumer Recycled Polyester 40-Degree Main Body 20D Recycled Nylon Ripstop With Non-PFC DWR Finish Sizes REG, LONG Total Weight reg - 3 lbs 13 oz (1730 g) / long - 4 lbs 1.8 oz (1864 g) Temp Rating 5AdegF / -15AdegC; 20AdegF / -7AdegC; 40AdegF / 4AdegC Stuffed Size 8&';&'; x 15&';&'; (20 cm x 38 cm) Internal Length reg - 80&';&'; (203 cm) / long - 86&';&'; (218 cm) Max User Height reg - 6&';2&';&'; (188 cm) / long - 6&';8&';&'; (203 cm) Anti-Compression Layer On Back Is Composed Of Synthetic Insulation Down Layer Can Be Used As A Stand-Alone Quilt For Campsite Lounging Durable YKKA(R) Zipper Included Compression Sack Is Fleece On The Inside So You Can Use It As A Camp Pillow Large, Fitted Hood Accommodates Pillows And Arms-Over-The-Head Sleepers Mid Layer Features 800 Fill Recycled Down Rated At 20AdegF (-7AdegC) For High-Level Performance In Adverse Conditions The Two Layers Can Be Paired To Get A 5AdegF (-15AdegC) Bag For Maximum Versatility Top Layer Features Synthetic Insulation Rated At 40AdegF (4AdegC) For Versatile Use In Warmer Weather Vaulted Footbox