TIEM Slipstream - Black-Black Women’s Cycling Shoe Size 10 The Slipstream is a performance cycling shoe that doesn't sacrifice the style and comfort of your favorite pair of sneakers. With its breathable mesh toe box, slip-on construction, and single-strap closure system, it's the most comfortable shoe you'll ever wear to class. Good gently used condition. (Go down a half size if your foot is narrow or you are between sizes.)