1.Dual-Sided Sensory DesignFeatures a spiky, textured surface for foot massage and balance training, plus a flat base for stable placement, making it perfect for sensory play and physical therapy. 2.Safe & Durable MaterialMade with non-toxic, BPA-free rubber that’s soft yet sturdy, supporting up to 220 lbs. It’s slip-resistant and gentle on bare feet, suitable for kids and adults alike. 3.Multi-Functional Training ToolGreat for improving balance, coordination, and motor skills, while the spiky surface also provides acupressure relief to ease foot fatigue and tension. 4.Versatile for All AgesKids can use them for sensory play and obstacle courses, while adults can incorporate them into yoga, pilates, or rehabilitation exercises to enhance stability. 5.Portable & Easy to StoreLightweight and stackable, these half balls are easy to carry to the gym, park, or therapy sessions, and they store compactly when not in use.