stretchy tubing options

Any primoflex tubing users can comment? Looking at redoing my system with 3/8's, fittings are all 1/2. Prefer something softer then tygon.

softer means more permiable meaning better bending unfortunately it also means less safe in computer applications

I'm using Primo in part of my loop. Yeah, it's a lot softer than Tygon so you'll need to lock it down tightly. It doesn't seem all that permeable in that my water level hasn't gone down much, if at all. It's easier to route than Tygon, for sure.