Our newest accessory, the Tracer sleeping bag liner, is incredibly soft and patterned to match our Spoon shape contours for extra comfort and warmth on any overnight adventure. Made of 100% recycled yarns with hollow core fibers, the THERMOLITE EcoMade fabric is unmatched in its warmth-to-weight ratio and efficiently traps more heat to extend the temperature range of your sleeping bag. Tracer is also treated with Polygiene Odor Control Technology, an antimicrobial finish that inhibits odor-causing bacteria. Allowing users to extend the time between laundering their sleep systems, this bluesign approved odor-free finish protects your sleeping bag's performance and longevity while also reducing micro-plastic shedding into the water stream. Whether you're looking to extend the life or the temperature range of your favorite sleeping bag, Tracer has you covered.