The Underlay by Mellow Mat® is an additional super soft memory foam layer designed to sit under your Mellow Mat to create an even more comfortable floor. It adds 20mm of thickness. When used with the Mellow Mat, the total thickness in the middle area is 55mm! If you love your Mellow Mat, you'll love it even more with this accessory.
Our
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Mellow mats are a must in our house not just for the kids who love the sensory feel but for us adults too who may have been known to fall asleep on one on multiple occasions while putting the kids to bed. My only recommendation is always get the bigger one! I seem to go a size to small every time and spend the next couple of years wishing I had a bigger one.
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Rebecca · October 19, 2026
The underlay is soft & comfy to walk & lay on. My only concern is that it’s smaller than my floor rug which could become a tripping hazard. It would be fantastic to have custom sized underlays to fit multi sized floor rugs that people may already have.