Tapas was a Force technique that allowed its user to draw on the power of the Force to remain warm in a cold environment. The Jedi Knight Jacen Solo once used this Force technique, employing it in conjunction with a Force shield during the Battle of Ebaq 9 in 28 ABY to survive in a mine that had lost its atmosphere.
Utilizing Tapas to retain one's body heat was used by Jedi in hostile environments, such as vacuum. If a Force-sensitive knowledgeable in Tapas found themselves in a cold environment, they could draw on the Force to keep themselves warm.
Tapas was an ability once displayed by Jedi Knight Jacen Solo, who used the technique during the Battle of Ebaq 9 of the Yuuzhan Vong War. When his mentor, Vergere, crashed an RZ-1 A-wing interceptor into the Ebaq 9 moon, perishing on impact and causing the mines in which Solo was fighting to lose atmosphere, he was forced to use Tapas in conjunction with a Force shield to survive in the depressurized area. He found it difficult to concentrate on Tapas and on maintaining the Force shield that retained his air, and so he began to shiver. He managed to hold on with the help of Vergere's spirit before help arrived.