Made of superior material, this massage yoga ball is perfectly fit for rolling along the foot, or anywhere you& 39;d like a larger area of massage. Easily integrates into any yoga, Pilates, cycling, running, weightlifting, and sport& 39;s exercise routine. Features -Color: black and red -Material: EVA -Size: 12.00X12.00X12.00cm/4.72X4.72X4.72in -Made of quality EVA materials, durable and can be used for a long time. -Helps to develop your overall body muscle, balance and coordination. -The exercise is relatively safe, with extra thickness, not easy to burst. -It can relieve fatigue and massage the whole body, thereby improving the quality of your sleep. -The workmanship of this product is perfect, and you will have a good experience in using it.