Two Piece Fiberglass Litter, for Vertical Evacuations and Horizontal one too.  About 17 pounds fits very nicely on a back pack frame.  Can be carried by one person with avolite pad, sleeping bag (with full length zipper),  water proof tarp, these, some webbing, and the medically required items, make for an effective evacuation.  When weather clean  the litter can be long-lined out.  By the way, you can actually build a fin or paddle type assembly to control potential litter spin.  Tie them in securely, litter spin actually ejected a victim once!  Litter Price, with out the wheels is $795.  Wheel assembly is $650 (comes with hand Drum brake that attaches the the rail on the litter, and the wheel is a quick attach and disconnect.                                                                                        H.A.T. Adjustable Litter Rig Comes with 2 sections (Head and feet)  Adjusts from head up to feet up, or inside up or inside down, all in flight.  Available with Carabiners, or without.  Price $149.00 w/o biners,  or with/ 5 large gate steel biners $249.00