Saucony Endorphin Speed 5 - Green - Size UK 8.5

The Endorphin Speed 5 is primarily designed for speed days, tempo runs, and race days, aiming to provide a fast, responsive, and smooth ride.

It uses PWRRUN PB cushioning, which is an energy-efficient foam designed for high responsiveness and a snappy feel.

The winged nylon plate offers torsional rigidity for stability and flexibility in the forefoot, contributing to snappy transitions and a responsive ride without being overly stiff.

Yes, its combination of cushioning, responsiveness, and SPEEDROLL technology makes it a capable option for marathon racing, particularly for runners seeking a balance of speed and comfort.

While capable of handling moderate training sessions, their design prioritizes speed. For very slow or recovery runs, a shoe with different cushioning characteristics might be more comfortable.

The Saucony Endorphin Speed 5 weighs approximately 8.4oz (238g).

The heel-to-toe drop is 8mm (36mm in the heel and 28mm in the forefoot).

They are best suited for asphalt and similar road surfaces.

Ensure the laces are adjusted correctly. Try a different lacing pattern or loosen them slightly, especially around the midfoot. If the issue persists, consider if the size is appropriate or if the shoe's volume doesn't match your foot shape.

The PWRRUN PB foam may take a few runs to break in fully. If the shoe still feels flat after several uses, check for any debris trapped in the sole that might be impeding the plate or foam. Ensure the shoes are not excessively worn.

Try a 'heel lock' lacing technique to secure your heel in place. Ensure you are wearing appropriate socks. If the issue is persistent, the shoe may not be the correct fit for your foot shape.

This is uncommon with the new mesh design. Ensure you are wearing socks. If a specific area feels abrasive, double-check for any loose threads or manufacturing defects. Contact customer support if a defect is suspected.