Should be ideal as they won't mark the floor- the material is quite thick although the strips are quite narrow and I don't know the dimensions of the gymnastic mats. Should work fine for yoga mats.
By John H. Foster on 25 January 2016
I am not an expert on materials, but it appears to be the same type of soft rubber used in underlay, and my experience of that is, that it turns to powder eventually, but that is after approx 20 years !! hope that helps..
By Maggie F on 30 April 2015
I use this in several places in my house. It wasn't a great success stopping a cover from slipping off my settee but has been very good at stopping my chopping mat from slipping off my work surface in the kitchen. On balance I would say it's better on flat surfaces.
By Amazon Customer on 04 April 2016