Never worn outside only to a few spin classes before I got a peloton and needed a shoe with a delta clip. -Women-specific last delivers the right support for maximizing pedaling efficiency -Women-specific fit takes into account the unique characteristics of the female foot, with a low, narrow heel section and a low-volume front end -Stretch-resistant synthetic leather/nylon mesh uppers are ruggedly built for long wear; breathable mesh aids ventilation -Wicking nylon lining absorbs excess sweat and disperses it quickly for fast drying -Triple rip-and-stick straps allow precise adjustment and maximize comfort; offset straps provide a snug fit without pressure points -EVA footbeds cushion for walking comfort -Aggressive rubber tread provides terrific traction when things get too messy to ride