Don't let cold and humid conditions stand between you and your footage. Battle them with some GoPro anti-fog inserts. Just drop these anti-fog inserts inside your HD Hero Original or HD Hero2 Professional camera and say adios to pesky fogging. These inserts are multi-use (simply dry them out in the oven), and come 3 sets per box...so basically you can't afford not to pick some up.
Item No. » GP-AFI