The Assos RSR Spring/Fall Speed Booties keep your feet warm and comfortable while promoting speed. They are more aerodynamically focused than the standard spring/fall booties, featuring less volume and a second skin fit. The tight fit uses Assos zeroPressure technology, assuring comfort while eliminating the need for a zipper. In addition to proper warmth, they are water repellant and low volume. Excellent breathability and elasticity keep them as comfortable as they are fast. The Assos RSR Spring/Fall Speed Booties are perfect for when you need to stay warm but dont want to give up speed.