Elastic and waterproof hot water bag designed for safe, reliable use. Key benefits Elastic material with waterproof construction for durable, safe operation. Provides warm, soothing heat to help relax the body and relieve discomfort. Largefill opening makes filling easy and reduces the risk of leaks during filling. Helps keep hands and abdomen warm in cold weather. What makes it stand out Flexible, resilient material that adapts to body contours while maintaining warmth. Practical large opening for convenient water filling and secure sealing. Effective for soothing multiple common pains and aches with targeted warmth. Attributes and performance Function: hot water bag for warmth and soothing relief. Material: elastic, waterproof construction for safe, repeat use. Fill mechanism: large fill opening to simplify filling and minimize leakage. Use scenarios Cold weather comfort: hold the bag to warm hands or place it over the abdomen for warmth during chilly days. Pain relief: use as a warm compress to help relieve arthritis, menstrual cramps, lower back pain, upper back pain, and general muscle aches. Postactivity recovery: apply to affected areas after workouts or heavy lifting to ease soreness and stiffness. Note: Use with appropriate hot water and ensure the opening is securely sealed to prevent leaks.