Premium construction for durable cooling and heating relief - High quality polyester fabric with a long service life and high abrasion resistance. The exterior is PVC coated to prevent leakage. What you get and how it works - 3 cooling/heating packs in sizes 15 cm, 23 cm and 28 cm for targeted coverage across different body areas; can also be used as a heat pad. - Just add warm water and tighten the lid to prepare for use. Easy and safe to use - Leak-proof large lid simplifies filling when using ice or water. - When used as a heat compress, the large lid can be filled with hot water to help reduce the risk of burns. Key benefits and practical attributes - Versatile size options allow precise application on ankles, knees, elbows, neck, shoulders, back and other small to mid sized areas. - Durable materials and leak prevention for reliable, repeated use. - Combines cooling and heating functionality in one set for flexible therapy. Use scenarios - Cold/relief therapy for sprains, swelling or sports injuries on ankles, knees or wrists. - Post workout recovery to soothe muscle soreness on shoulders, back or neck. - Targeted hot therapy for tension relief in hands, wrists or small muscle groups.