Similar to the J series, the T series uses large gemstones, about 1 inch in diameter, to line the outer layer of each model. These gemstones absorb the heat from the mat and convert it into far infrared rays and negative ions. When the user lies on the surface, the hot stones use the weight of their body to press into their muscles and tissue to relieve tension, stress, and discomforts. This relaxes both the body and the mind creating an overall soothing experience. Tourmaline is one of the most coveted natural gemstones for wellness benefits. Tourmaline is known to have an energizing effect that stimulates the energy levels. Tourmaline is the gemstone that is recorded to have the highest output of negative ions in comparison to jade and amethyst. The T series comes in all the standard sizes, but it also includes some region-specific models. There is a knee model that is ideal for arthritis pain in the knee or sports injuries. The belt model is helpful for abdomen pain, stomach aches, or chronic lower back pain. The pillow is a great complimentary device that can support the neck while you sleep or can go behind the knees while you use a mat. If you are interested in a T mat you are guaranteed to find the perfect one for your situation.