No matter what kind of shape that you're in, a triathlon will test your preparation. You need every advantage, and with Zoot's Women's CompressRx Tri Ultra Shorts, your output will be more consistent, and your recovery will be shorter. It's no secret these days, the term 'compression' is thrown around rather loosely. But there are a handful of true compression driven designers out there with one of the foremost being Zoot. Accordingly, you'll find that the pieces like the Ultra CompressRx Tri Shorts are actually close to medical grade. In fact, prescription grade compression pressures run from 25mmHg and up, while the Ultra features pressures ranging from 18 to 25mmHg. How is this possible from a sports piece' Well, to start, the Ultra uses a 30 x 17 compression level, and 280 gram denier that specifically targets the muscle groups used in endurance exercise. So, according to Zoot's graduated compression ideology, each group, or zone, of compression work to stabilize the core areas of exertion within the legs. Effectively, this improves blood flow to the heart by accelerating the circulation. These core principles encompass what Zoot calls its ZoneRx and CRx graduated designs. Over a run or ride, your muscles are constantly under assault from the detrimental effects of road or impact vibration. Over time, this variable will cause major muscle fatigue. So, to minimize this effect, the Ultra features Zoot's proprioception paneling. Basically, this means that the paneling is designed to account for the sensations that are enacted from within the body itself. Everyone has what are called 'proprioceptors.' These are cells and nerves that emit stimuli to account for your body's position in movement. Or, in more basic terms, think of balance. Your unconscious sensory correction of staying upright is attributable to these cells. And you're your body is performing repetitive, practiced movements, the impact on the required muscle groups also become predictable. So...