Nike Alpha Shark 2 3/4 - Men's The next time you take the field, be a game changer in the Nike Alpha Shark 2 3/4. Dynamic Fit system lets you cinch up for great lockdown. 3/4-height collar supports the ankle on lateral cuts. Forefoot cleats enhances traction on toe-off. TPU outsole with 12-cleat configuration provides excellent traction. Wt. 11.9 oz.