LARGE DIAMETER WATER INJECTION PORT — Convenient water injection, anti-scalding and anti-splash. THREADED CAP — High temperature resistance, corrosion resistance and no water leakage. FEATURE — Thickened PVC, evenly heated, comfortable to the skin, hot and cold dual-use , safe, no peculiar smell. KEEP WARM LONGER — Excellent thick material, more heat storage, even heat dissipation. Warm and comfortable , feet, shoulders, uterus and waist warm.
