Nike Air Zoom Alphafly NEXT% 2 'Prototype' - White - Black - Trainers - Size 15

Yes, the Alphafly NEXT% 2 are specifically designed for long-distance racing, including marathons, due to their advanced cushioning and energy return properties.

While they offer comfort, their highly specialized design is best preserved for racing and key workouts. For daily mileage, a more durable, less aggressive trainer might be more suitable to extend the lifespan of the Alphaflys.

Use a slightly damp cloth to wipe away dirt. Avoid soaking the material. Allow to air dry completely.

The 'Prototype' designation often indicates early production runs or specific colorways. Core technology and performance features are generally identical to the standard model of the same series.

Nike typically offers full and half sizes. Consult a size chart or try on if possible, as the fit can be personal. Given the UK 15 provided, a 14.5 would be the closest half size.

The shoe features a built-in carbon fiber plate that offers a degree of structure and support. However, they are designed for runners who require minimal stability assistance and benefit most from a neutral shoe.

This is common due to the advanced technology. Wear them for short runs or walks to gradually break them in. The materials will become more flexible over time.

Ensure you tie a secure double knot. Consider replacing the laces with ones that have better grip if this persists.

The advanced foams and Air units are durable, but performance may naturally decrease after extensive mileage (typically over 300-500 miles). Consider replacement when noticeable.