The Sea to Summit Reactor Sleeping Bag Liner is made from Thermolite, which is a breathable hollow core insulating fiber. The liner adds up to 15 degrees F of warmth to a sleeping bag or, when used alone, is an ideal warm weather sleeping bag.
• Weighs just 8.7oz
• Packs into its own 3" x 5" sil nylon stuff sack
• Lighter weight, more packable than fleece
• Adds up to 15 degrees F / 8 degrees C of warmth to a sleeping bag
• Mummy shape with a box foot
• Draw cord hood with mini cord lock
• Color of liner is black