does anyone know what's the difference...
does anyone know what's the difference between marmot lithium and marmot lithium membrane sleeping bag?
The outer shell. The regular lithium uses 20-denier Pertex Microlight nylon, and the Membrain version uses (depending on the model year) either Marmot Membrain waterproof fabric, or Pertex Shield waterproof fabric. Basically, one's water resistant, the other is water proof.