The ST-ON Portable Heater Concept is what every adventurer needs, especially when it comes to the winter season. Shaped like hot stones, these heaters can be placed on particular body parts to keep them warm in cold climates. Although it is made with winter activities in mind, specifically mountain climbing, the 'stones' can be used by people who simply hate being cold or who have bad blood circulation. Not to mention that they can be used indoors as well as outdoors.
Designed by Sooeon Kim and Sangyong Park, the ST-ON Portable Heater Concept is inspired by the Korean practice of using actual heated stones to keep warm during particularly harsh winters. When heated, the 'stones' turn a bright orange to signal that they are ready.