Good ideas gloves manufactured from 3m thinsulate fibre featuring a thermal soft acrylic lining for added heat retention as well as a water resistant outer material they will circulate a gentle warmth around the hands and fingers which makes them ideal for skiing fishing and cycling etc they heat up in a matter of minutes and will keep hands warm for hours each glove requires 1 x size d battery which is not included and should last up to 5 hours approximately r r 3m thinsulate fibre with