|This is a true sleep system, insomuch that the liner and the fleece can be used together or separately according to temperature conditions. The "fleece bag" is just a thin polyester blanket with a satin border. The cotton liner is a thick sheet reminiscent of coarse muslin. Laundering will be necessary to remove the not-unpleasant storage odor. When zippered, the nylon cover has the profile of a mummy bag, with a little extra space in the foot box.
Most importantly, this sleep system is tailored for the genuinely slender individual. Users who are taller than 6'0" or so might have a bit of difficulty stretching out.