Worn for only for 3 training runs This is the best speed trainer I’ve met! Saucony Kinvara Pro size 8.5 in White / Ink Per the Saucony Website “With our advanced PRO formula, running never felt so easy PROPEL- SPEEDROLL technology works like an propeller – gently rolling you forward with an accommodating 3/4-length carbon plate everyone will love REBOUND - Like a trampoline, its bounce is joyfully addictive. Experience 90% energy return and ultimate spring in your stride thanks to PWRRUN PB cushioning OPTIMIZE - Built for the 99% of runs that keep you improving – day after day - filling your run tank never felt so easy SPECS Category: Neutral, daily trainer Stack height: 42mm Offset: 8mm (42mm / 34mm) Weight: 8.5oz (240g) Sustainability: This style is vegan and contains recycled materials”