Underlay for the Mellow Mat®

Wasn't sure 20mm would make a noticeable difference but my knees definitely feel it after a long day standing at my desk. The memory foam layer squishes down just enough without bottoming out, and it stays put under the mat instead of sliding around.

The extra 20mm under my mat turned it from comfortable into genuinely luxurious—my hips and knees don’t ache after floor stretches anymore. It’s soft but still gives enough support that I don’t sink all the way through. Worth it if you spend time sitting on hard floors.

I was skeptical 20mm would make much difference, but the couch-like sink-in effect is real and my joints thank me after long floor sessions. The memory foam layer stays perfectly in place once it's under the mat, no shifting or bunching at the edges.