- The Venustas heated underwear is equipped with graphene heating elements and has a slim-fit design to minimize heat loss. - Items purchased during the sale are not eligible for refund or exchange unless there are heating issues, such as not heating up or not being able to turn on. - A company called QQA has invented rechargeable underwear for women that claims to offer health benefits and keep them warm during winter and their menstrual cycle. - The underwear promises to ease cramps and improve reproductive health. - However, people express concerns about safety and the possibility of overheating. - QQA and those who have tried the underwear assure that it is safe for daily use and can keep the wearer warm for up to 12 hours. - The underwear can reach temperatures between 37°C and 50°C and has five heat settings. - It is soft and comfortable to wear and can be hand-washed after removing the battery.