Stay warm in a range of conditions with the Flip 35/50 Degree Sleeping Bag from Mountain Hardwear: turn the 35 degree side up for more warmth on cool nights, or flip the bag over in milder weather for a 45 degree rating. Insulated with lofty Thermic MX(TM), this roomy and comfortable semi-rectangular bag can be zipped together with another semi-rectangular bag. Unzip all the way for a comfortable, warm camping blanket.