Women's Saucony Endorphin Pro 4 - White Silver Size:12.0 is an inert gas meaning

is an inert gas meaning it does not readily undergo chemical reactions with other substances

7/8" collar

Ultra-light AFO stretch woven fabric for a barely-there-feeling shell

Dark Heather Grey)

For the Glycerin GTS 21 women's running shoe

Women's Saucony Endorphin Pro 4 - White Silver Size:12.0 is an inert gas meaningElite carbon plated racing shoe featuring revolutionary dual foam technology with PWRRUN HG and PWRRUN PB foam for maximum energy return. Engineered for marathon and half marathon racing with an 8mm drop and weighing just 7. 5oz. The full length carbon fiber plate and SPEEDROLL technology deliver explosive propulsion while maintaining exceptional comfort for long distance performance. Sizing Length: True to size, though runners coming from the Pro 1