Is washing them in 40°C really enough to keep the period underwear hygienic?

We recommend you wash your period underwear at 40°C, as it will help them last longer while maintaining the function and performance of the underwear. The layers in the gusset of the underwear are treated with an anti-odour and antimicrobial treatment that prevents the growth of bacteria. This means that you can wash your period underwear in cooler temperatures and still keep them clean and hygienic.