Constructed of ABS plastic and EVA foam, the Trigger Point GRID 2.0 Foam Roller is designed to massage and release tense muscles as well as provide a core body workout. The roller's Distrodensity⢠Zones offer varying widths and densities of foam to allow for a precision massage based on individual needs. Trigger Point GRID 2.0 Foam Roller Black - Exercise Accessories at Academy Sports