On Cloudspike Citius 2 men's Size:11.5 PU is short for polyurethane

PU is short for polyurethane

reflective vest that also lights up to help be seen in low light conditions

Carbon fiber plate with new winglets

Visible from all angles (up to 200 meters)

quick-dry fabric combines with a moisture-wicking sweatband to keep you cool and dry from your first step to your last

On Cloudspike Citius 2 men's Size:11.5 PU is short for polyurethaneLITERALLY MEANS "FASTER." Unlock your fastest self in the Cloudspike Citius 2 and break barriers from 800m to 1600m. Engineered with OAC, On Athletics Club, athletes for lethal speed and precision, the Cloudspike Citius 2 combines Helion HF, a Pebax hyper foam, for supreme energy return you can feel with a unique half length Speedboard that is a blend of fiberglass nylon that catapults you forward. UPPER One piece mesh is precision tailored for