SPRI Foam Rollers are perfect for developing core stabilization, lower-body balance and stamina. May also be used for gentle stretching and self-mobilization of joints and spine. Microban antimicrobial protection helps prevent the growth of damaging bacteria on these foam rollers. This long-lasting, durable technology won't wash off or wear away, keeping the foam rollers cleaner between cleanings. Available in Half or Full Round with a 12" or 36" Length and 4" or 6" Diameter. Or grab either a Half or Full Round Kit containing all 4 styles available.