Features of the NEMO Forte 20 Sleeping Bag New line of synthetic sleeping bags combine two award-winning Features at a compelling value Our Spoon shape which offers additional room at the elbows and knees for side sleepers and Thermo Gills which allow temperature management through the night with zippered vents that allow hot air to escape Blanket fold is a small feature that makes a big comfort difference providing a soft blanket around your face for snuggling and to keep cold air out Premium stratofiber synthetic Insulation offers a superior night's sleep compAred to anything else at this price