When your house consists of two aluminum supports holding a couple of pieces of water-repellent ripstop material and can easily be packed into a stuff sack the size of a huge Italian submarine there's something really cozy about that to slip into Rab Neutrino 200 Sleeping. Bag after a long night on the road. This sleeping bag Made from durable Quantum Pertex ripstop material has a cone-shaped design, trapezoidal partition corner footbox and inner collar (complete with cord) and the 800-density down insulation is filled with Nikwax water. -resistant processing which makes the down hydrophobic and does not contain fluorocarbons. Not to mention that the Neutrino 200 weighs just over a pound what makes this sleeping bag ideal for hiking cycling or minimalist hikes.