TRNR Acu Trigger - BlackBuilt for targeted compression, the TRNR Acu Trigger enables you to effortlessly sustain pressure on specific points of your body by using your own weight. Suitable for both the upper and lower body, it can also be handheld for a more gentle approach. It is made from hypoallergenic and sustainable silicone so it's gentle on your skin. The closed cell construction means it won't absorb perspiration, preventing bacteria growth and bad odours. You can