You can use the Ailia Bottle without the Body Strap however we do not recommend using the bottle without it at the full 70° Celsius. We need to protect our skin so adding a layer of protection when using the Ailia Bottle, is important for several reasons: Heat Distribution: The ailia bottle can generate significant heat, and direct contact with the skin may cause uneven heat distribution or localized hotspots. This can potentially lead to redness, skin irritation, or even burns. By using a layer of protection, such as the ailia body strap, the heat is more evenly distributed, reducing the risk of discomfort or injury to the skin. Insulation: The ailia body strap acts as an insulating barrier between the ailia bottle and the skin. It helps to minimize the transfer of heat, ensuring that the temperature remains within a safe and comfortable range. Without this additional layer, the skin may be exposed to excessive heat, which can result in skin irritation and potential damage. Prevention of Accidental Contact: Sometimes, when using the ailia bottle without the body strap, there is a chance of accidental contact between the bottle and sensitive areas of the body, such as the abdomen. This can be risky, as these areas are more susceptible to heat-related injuries. The body strap provides a secure way to keep the ailia bottle in place, minimising the likelihood of accidental contact and associated risks. Comfort: Using the body strap can enhance the overall comfort of using the ailia bottle. It helps to secure the bottle in the desired position, preventing it from shifting or slipping. This ensures that the heat is consistently applied to the intended area, providing effective relief from pain or discomfort. Overall, adding a layer of protection, such as the body strap, when using a hot water bottle is recommended to ensure even heat distribution, prevent skin irritation or burns, minimise accidental contact with sensitive areas, and enhance overall comfort during use. It serves as an additional safety measure to protect the skin and promote a positive user experience.