We're working out what we think - we'll add our view here!
Gossamer Gear says:
Elastic cord for attaching your bear can or family sized bag of honey bbq lays to your pack. Or don't attach anything because you're a minimalist that just wants to make their pack look cool.
We're working out what we think about Gossamer Gear's Shock Compression Cord, we'll add our comments here in due course.