The One Bag is the ultimate in flexible comfort, no matter the conditions. Whether you're a beginner looking for options or a hardened camper who'll be in a range of climates, this 800 fill ProDown sleeping bag is exactly what you need.Top layer features 40-degree-rated Heatseeker Eco Advanced synthetic insulation for versatile use in warmer weatherMid layer features 20-degree-rated 800 fill ProDown for high-level performance in adverse conditionsThe two layers can be paired to get a 5-degree bagDown layer can be used as a stand-alone quilt for campsite loungingLarge, fitted hood accommodates pillows and arms-over-the-head sleepersAnti-compression layer on back is composed of Heatseeker Eco Advanced synthetic insulationVaulted footbox