Nike Air Zoom Alphafly NEXT% 2 'Prototype' - Trainers - White - Black - UK 9.5

These trainers are designed for elite performance and may be too aggressive for beginners. They are best suited for experienced runners focused on speed and competition.

A proper fit should feel snug around the heel and midfoot with enough room in the toe box for your toes to splay slightly. There should be no excessive heel slippage.

While they can be used for tempo runs and specific speed training, they are not recommended for everyday jogging or casual wear due to their highly specialized and responsive design.

The 'Prototype' colorway offers a unique and distinctive aesthetic, differentiating these shoes visually from standard releases.

The shoes feature a combination of responsive Zoom Air units and advanced foam that work together to provide high energy return upon impact and a propulsive feel during toe-off.

The lifespan depends heavily on usage frequency, intensity, and running surface. For competitive runners using them primarily for races and key workouts, expect several hundred miles, but this can vary significantly.

Ensure you have selected the correct size for a proper fit. The shoes may require a 'break-in' period of a few runs to adapt to your foot and unlock their full responsiveness.

Ensure the laces are tied securely using a double knot if necessary. Consider alternative lacing techniques that provide a tighter hold.

Inspect your running form and ensure you are not over-striding or dragging your feet. Excessive wear may also indicate the shoes are being used for purposes other than their intended high-performance running.