<UL><LI>Heat in microwave, contains 100% flaxseed </LI><LI> Can use with any hair treatment</LI><LI> Even heat distribution </LI><LI> Reusable</LI></UL><BR/> Salon Care Microwavable Heat Processing Cap just needs to be heated in the microwave, no cord, no fuss! The filling is 100% flaxseed and will hold heat for up to 30 minutes. The cap is reusable time and time again. Use with any hair treatment that calls for heat.