Sea to Summit Clothesline
This is one of those little camping gizmos that your whole group ends up using for the entire trip (sometimes after making fun of you for bringing it). So small it folds into it's bag to the size of a chicken's egg, the lightweight line stretches to 3.5 metres. There are little rubber beads along it that cinch your wet things so they don't fly off the line in the wind. Better than getting sap all over your clothes from draping them over tree branches.
Length: 3.5m /11.5ft
Weight: 22g /1.3oz