I have a few of these grid foam rollers. They work great and this color was actually a little cooler than I expected. I think I even like it more than my orange one! The foam density is great for most everything I use it for though I am curious how the gridx foam roller would be with the feet, for these are a little to soft for that.
The GRID foam roller is for anybody who wants to move better. Use the GRID for a self-massage and roll through the tight muscles, knots and kinks that prevent feeling good and moving well.