Two compact rolls of duct tape, 50 inches each, wound flat for packing.

A full roll of duct tape is heavy and mostly wasted weight. Fifty inches is the amount a trip actually uses, in a form that fits a first aid kit.

It patches a tent, a sleeping pad, a jacket, a water container, a boot sole and a cracked trekking pole. It tapes a dressing on, splints a finger, and closes a torn pack.

Real duct tape, not the thin stuff. Two rolls so one lives in the pack and one in the vehicle.