A pinnacle-performance 3-season 800 FP down bag, Riff™ offers a trim, athletic cut designed for side sleepers who crave space-saving packability.NEMO’s iconic Spoon™ bags are cut wider at the elbows and knees, so campers can easily shift positions throughout the night, and the Ultralight Spoon silhouette used on Riff maintains that extra room while cutting in tighter at the feet and shoulders. The result is a sleeping bag vastly more comfortable than a mummy bag, but still impressively compact.With a shell manufactured fully from PET, this sleeping bag is 100% recyclable at the end of its life - just send it back to NEMO, and they’ll handle the rest.Materials100% post-consumer recycled polyester ripstop with PFAS-free DWRRDS 650FP down with PFAS-free DWRFeaturesUltralight Spoon™ shape adds room at elbows and knees yet is tailored for weight-shaving warmth.Updated Thermo Gill™ vents extend the comfort range and create fine-tuned control with their multistage zipper system.Updated Blanket Fold™ design offers a cosy, oversized draft collar that dramatically blocks cold air or releases excess warmth.NEMO takes full responsibility for all Endless Promise® products, from production to end of life, and designs them for 100% recyclability to keep out of the landfill.Filled with premium 800 FP hydrophobic, PFAS-free, RDS-certified down. Products certified to the Responsible Down Standard (RDS) contain down or feathers from farms certified to animal welfare requirements.Hood and footbox are reinforced with recyclable material treated with PFAS-free waterproofing to prevent tent condensation from soaking into the bag's fabric.Body-mapped design includes new 3D footbox for tailored comfort and warmth.Zip two Riffs (with opposing zipper sides) together to create a double sleeping bag.Anti-snag zipper features protective edging to stop fabric from getting caught in the zipper pull.Regular LengthTemperature RatingsListed Temp: -9°CISO Comfort: -2°CISO Limit: -8°CWhich temperature rating is right for me? Cold sleepers - refer to the ISO Comfort rating. Warm sleepers - refer to the ISO Limit rating.A closer lookRiff includes a set of next-generation Thermo Gill™ vents on the chest to offer fine-tuned temperature control and a better outdoor sleeping experience. Each Gill features an interior and an exterior zipper with a draft-blocking intermediate layer, allowing several different configurations for dialling in the bag’s temperature without direct exposure to cold air. The Blanket Fold™ draft collar at the neckline features a redesigned size and shape to further optimize sleep temperature. Tucked in, the Blanket Fold defiantly blocks any chill while mimicking the comfort of your bed at home. Pushed out, it helps dump excess heat instantly. Finally, Riff includes strategically designed baffles insulated with water-resistant, RDS-certified down that are placed vertically along the torso for comfort and aligned horizontally below the waist to prevent down migration.Riff™ is NEMO’s top-of-the-line, backcountry-oriented sleeping bag - and it’s also the latest addition to their suite of Endless Promise® products. NEMO Mens Riff 15 Endless Promise Sleeping Bag - Regular