Always carry 50 feet of 550 cord in the daypack or the overnight backpack. Use it for rigging a poncho as a lean-to shelter and numerous other uses. Like someone said, $7 for 100 feet, cut that in half and 50 feet goes in each pack. Weight is 4 ounces on my postal scale, I think I can handle the weight.
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No, I am not Bear Grylls, but I stayed at a Holiday Inn Express last night and Bear was there too!