Zip-in down-filled panel adds 8” of girth to most sleeping bags with #8 zippers. FEATURES Zips in to all bags with #8YKK zipper and adds 8" of girth at shoulder...more info

Zip-in Polarguard®-filled panel adds 8” of girth to most sleeping bags with #8 zippers FEATURES Zips in to all bags with #8YKK zipper and adds 8" of girth...more info

Marmot Trestles 40 FR - 40°F Sleeping Bag Summer camping bag that unzips to form a cozy blanket. Ideal for road tripping, couch surfing and warm-weather backpacking....more info

Marmot Trails Sleeping Bag With DriClime® as the only insulation, this is an ideal summer-weather bag or bag liner for travel and adding warmth and versatility...more info

Sierra Designs 600 Fill Down Stretch Addition - Women's A 600-fill down zip-on expander, compatible with any bag using a YKK number 8 zipper, to increase space...more info