Set of 3 natural cork massage balls by the brand Halfmoon. The BC loves this product becasue it's a ligjhter & more natural alternative to the traditional firm lacross ball.
 
Content
Smooth & firm cork massage balls. 
Includes two 75mm (3 in) massage balls and one 50mm (2 in) ball
100% natural cork fiber - a renewable resource
 
Use for muscle and soft tissue tension release.
Popular areas of tension release are bottoms of feet, hamstrings, quads, glutes & back. 
Lean into floor, chair, wall or hard surface to generate greater preasure.