ALPS Mountaineering Wisp Sleeping Bag Charcoal/Red. The fleece liner interior delivers a soft comfortable layer next to the skin that doesnt promote sweat like some bags with nylon interiors. A left-side zipper also allows the top of the bag to be opened keeping the upper torso cool and the lower torso and legs comfortable. For nights when the temperatures dip below average the Wisp can serve as a lightweight outer bag for lighter higher temperature-rated mummy bags. This gives campers an easy way to adjust to changing temperatures without having to rely on a bag that may be too warm or too cool. Specifications for ALPS Mountaineering Wisp Sleeping Bag: Manufacturer: ALPS Mountaineering Color: Charcoal/Red Bag Size: Regular Temperature Rating: 30 Fahrenheit Bag Shape: Mummy Zipper Type: Right Lining Material: Fleece Insulation: Fleece Gender: Unisex Weight: 1.8 oz Age Group: Adults Condition: New Height: 32 in Fabric/Material: Polyester Length: 80 in Sleeping Bag Size Regular Length 80 in Weight 1.8 oz Features of ALPS Mountaineering Wisp Sleeping Bag Lightweight liner over bag or summer sleeping bag #5 separating zippers Package Contents: ALPS Mountaineering Wisp Sleeping Bag 5.5" x 10" standard stuff sack ALPS Mountaineering 4900042: Wisp Sleeping Bag Charcoal/Red