Weight: 240 g (size UK 5.5)boost™'s energy-returning properties keep every step charged with an endless supply of light, fast energyTextile and synthetic upperComfortable textile lining; Protective sock extension with 3-StripesTRAXION™ outsole for maximum grip in all directions; Continental™ Rubber outsole for extraordinary grip in wet and dry conditionsRunner type: stable; Stack height: 29 mm / 18.5 mm (10.5 mm differential)