The Lamina 20deg Sleeping Bag by Mountain Hardwear is a bag designed for cold temperatures of 20degF /-6degC. The Lamina 20deg Sleeping Bag is an excellent choice for damp, winter conditions, with welded layer construction that maintains loft in the bag through repeated washings and compression cycles. This comfortable, roomy, mummy cut bag is insulated with ThermicMicro fill - an exclusive insulation developed for its loft, durability, softness and compressibility. Made from a combination of hollow and solid staple fibers. The fine denier of the fibers and thermo-bonding manufacturing process produces an insulation that is thermally efficient, structurally stable, and has excellent loft retention. Face gasket and Ergo Draft Collar work together to seal in warmth.