This Soft PVC Material Sand Filled Kettlebell Features a Flexible, Odorless Polyvinyl Chloride Outer Shell. the Interior is Densely Packed with High-grade Sand, Offering Stable Weight Distribution for Controlled Movements. Its Soft, Shock-absorbent Body Reduces Impact Noise & Protects Floors From Scratches. the Ergonomic Curve Handle Ensures a Comfortable, Non-slip Grip Even During Sweaty Training Sessions. Sealed Edges Prevent Sand Leakage & Enhance Durability. Perfect for Swings, Squats, Presses, Lunges, & Core Stabilization. Suitable for Home Gyms, Group Classes, Physical Therapy, & Travel Fitness.