These colorful massage balls are a great tool for relaxing and relieving stress. The balls come in a variety of colors, each vibrant and full of life. Made from high-quality PVC, they are soft and hard in the right way, and they are covered with raised spikes that can precisely stimulate muscles and effectively relieve fatigue. These products can be used in a variety of ways, and they are easy to use. Whether it is your arms, abdomen, or soles of your feet, you can use these massage balls for deep tissue massage. As shown in the picture, you can use it to massage your arms to relax muscles, massage your abdomen to promote digestion, or step on it to stimulate the acupuncture points on the soles of your feet to help you quickly recover.