shock cord

Zpacks sells it by the yard in 1/16" and 3/32"

Thru-hiker or Zpacks.

Another place that has a decent stock is Supply Captain.

local sewing shops sell "round elastic" and some of it can be pretty thin and i use it for under cords all the time. i find a lot more white than black though. The Zpacks stuff is similar to what i've found local where the thru-hiker stuff is much nicer shock cord stuff, but both work great for this job

-Tim

thanks guys,
I looked on thru hiker prior to posting but must have missed it.

I didnt think of zpacks…I have been drooling over one of his cuben packs and tarps so I try desperately to stay away from his site :)

I know this sounds like blasphemy on BPL but I've used REI shock cord to good effect many times (repairing tent poles and such).