Nike Alpha Adapt Crossbody Medium - Black/Black/White - The weather-resistant Nike Alpha Adapt Crossbody (Medium) Mens Training Duffel Bag has an adjustable side clip that allows you to turn it into a convenient cross-body shoulder bag for easy, out-of-the-way carrying. 3-Way carrying comfort. Adjustable shoulder strap for shoulder or cross-body carry. Weather-resistant material deflects water and dirt. Double-grip handles for versatile transport. 100% textile.