The 66fit Spiky Massage Ball (10cm) Soft is designed to gently massage muscles, stimulate circulation and relieve tension This 10cm soft spiky massage ball provides moderate stimulation for a gentle therapeutic massage to help relax firm tight muscles It is particularly recommended for the shoulders and upper body area but may also be used on legs and back This compact soft spiky massage ball is easily portable, ideal for use at home or away While relieving specific areas of pain and discomfort, the comfortable grip design minimises any strain on your hands during use.