PREMIUM QUALITY AND SAFETY:The hot water bottle in the hot water bottle bag foot warmer is made of natural rubber with good heat transfer, large capacity of 2 liters, should be filled to about 2/3. The wide mouth of the bottle is easy to fill with water to better meet your warmth needs. Tip: We recommend pouring water at a temperature of no more than 80 degrees Celsius. SOFT AND WARM:Both sides of the foot warmer are made of super soft face cloth, which is especially durable and warm.Foot warmer pads can relieve pain and soreness in the feet and legs. Increases blood circulation, relaxes and warms the legs. The warmth lasts for hours. The bottom material is non-slip, light weight and easy to carry, whether you are at home, office or in the car, you can use it to warm your feet and hands or as a travel pillow, perfect for cold days. APPLICABLE SIZE: Foot heating kettle is to meet long-term heating needs, suitable for most adults (shoe size 44-46) use, heating slippers have a 360 around the design, soft and thick material and snug design can keep the heat inside the pad. With a non-slip design on the bottom and a flexible range of use, they are perfect for constant warmth under a table or on a sofa in cold weather. BEST GIFT: Water Bottle Foot Pad is a perfect Christmas or holiday gift for family, friends or relatives to show them your care and love and help them chase away the cold easily in winter. Heated feet can relieve pain and soreness in feet and legs. Relaxes and warms the legs. Size: 30*33*5cm Weight: 450g Color includes: gray, pink, color, black with white Package includes: 1pc * warm shoes