Join Date: Dec 2005
Location: Gold Coast, Australia
Seatbelt webbing and two D-rings plus a sewing machine. Anywhere that does repairs will be able to sew it together. Folds down to cigarette packet sized. Slip the end through a frame rail, through the D-rings (like a helmet), adjust the length, strap over shoulder and lift. It also helps if you have a velcro strap to strap the front brake lever down.
Cost is around $10 for materials and it's very effective. Also useful for dragging a bike out of a ditch etc.