I don't know specifically about the Inspira frame, but my wood Hinterberg frame uses clamps with velcro straps and I have velcro on the sides. My clamps are the more traditional ones which are kind of hard to use. If I had unlimited money, I would purchase these clamps:
http://www.nolting.com/view-detail.php?pid=491
I'm pretty sure that's velcro on them.
Plus, I just ordered the Red-E-Edge clamps:
http://www.youtube.com/watch?v=n6l5lq_lttI