There are two things to know about the mint in our fabric: Firstly, our fabric is built using fibers made from mint and bamboo which naturally feels cool to the skin upon touch and this cooling effect never washes away. Secondly, our fabric goes through a special mint oil treatment which offers antibacterial properties and lasts for up to 50 washes. So, even after 50 washes when the mint oil effect washes away, the cooling effect will still remain intact due to the fact that the fabric is made using mint and bamboo fibers.