See: HUDY

HUDY have introduced a new must have for every RC driver racing outdoors in cold conditions, the Exclusive radio winter bag and heat pad. The winter bag for right-handed drivers will keep hands warm no matter the outside temperature thanks to the reusable HUDY heat pad. The ultra-lightweight, super-soft bag features extra-large interior space for maximum comfort while handling the transmitter, and the smart design incorporates an externally-accessible pocket for exchangeable and reusable heat pad that generates extra heat for a minimum of 30 minutes. The sleeve is produced from even softer material for maximum tension-free feeling.

The HUDY heat pad features a special crystal liquid that will easily activate via integrated metallic disc to generate heat. The heat pad will generate heat for 30 minutes and then will gradually cool down. There is no limit as how many times the pad can be reused. To recharge the pad, put it in boiling water for 5-10 minutes until all crystals are dissolved, and then the pad can be reactivated again.