After a 15 mile day with elevation gains and losses that have left your head spinning, take comfort in the fact that the Mammut Sphere UL 3 Season 14 Degree Down Sleeping Bag will be there once you're ready to set up camp. Through a combination of lightweight fabrics and a high quality down fill, this sleeping bag will deliver the comfort you crave when you hit the sack for the night at a weight that won't bog your backpack down. The wind and water resistant Prolight TX fabric is treated with a DWR coating to protect the down insulation from losing its loft if your bag should come in contact with moisture. Mammut's innovative baffles assume a wave shape, which prevent the bag from slipping but also eliminate cold spots in the bag. Mammut's performance hood allows for a full range of vision when the hood is cinched down but is also effective at insulating against the cold. A neck collar eliminates draft, while the ergonomic footbox gives your feet room to wiggle while you sleep.