Design: SPEEDROLL technology gently rolls you forward with an accommodating 3/4-length carbon plate PWRRUN+ sockliner for soft step-in comfort PWRRUN PB cushioning provides energy return and an ultimate spring in your stride Additional Details: Weight: 8.5 oz (240g) Stack height: 42mm Offset: 8mm (42mm / 34mm) Sustainability: This style is vegan and contains recycled materials