Nike Air Zoom Alphafly NEXT% 2 Prototype - White

While durable, these shoes are optimized for speed and performance. For daily mileage, consider a more cushioned and robust trainer to preserve the lifespan and performance of the Alphafly NEXT% 2 Prototype.

Refer to Nike's official size chart and measure your foot length in centimeters. Most users find them true to size, but if between sizes, it's often recommended to go up half a size for a bit more room, especially for longer distances.

The NEXT% 2 typically features an updated foam compound and a slightly wider base for improved stability, alongside refinements to the Zoom Air units and carbon fiber plate for enhanced responsiveness.

The outsole provides good traction, making them usable in light rain. However, heavy downpours can affect grip, and excessive water saturation should be avoided to protect the materials and ensure proper drying.

For their intended use (racing and speedwork), expect around 200-300 miles before performance significantly degrades. High-mileage training will reduce this lifespan.

The 'Prototype' designation in the name indicates these are models that closely resemble or are based on early development versions, often featuring unique colorways or slight design variations from the final retail release.

This is common due to the carbon fiber plate. Wear them for shorter runs or walk around in them for a few sessions to break them in gradually. Ensure you have the correct size; a shoe that's too small can feel stiffer.

Check for excessive wear on the outsole or midsole cushioning. Clean the shoes as per care instructions. If significant wear is present, it might be time to consider replacement, especially if used heavily for racing.

Verify the lacing is not too tight, particularly around the forefoot area. Ensure the sizing is correct. If discomfort persists, these shoes might not be the best fit for your foot anatomy or running gait.