High Density EVA Foam Rollers are extra firm and will last much longer then White single construction foam rollers. They can be used to enhance balance, body awareness, muscle re-education, flexibility, myofacial release & dynamic strength. Dense foam construction of rolls provides firm support for all body types. Foam rollers are an essential tool for pilates core abdominal & back stabilization. Foam rollers are also an excellent aid for self massage of the upper and lower back, calf, hamstring, glutes and quads.