The reinforced eyelets withstand up to 200N of tension during lace cinching, running shoes under 70.

LITERALLY 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 meshis precision-tailored for breathability, minimalist weight, and locked-down racing support.
• Made of 100% recycled polyester.
  

MIDSOLE.

• Helion HF ( 40% bio-based) utilizes Pebax responsiveness in an extremely lightweight package.
• Half-length fiberglass-nylon Speedboard loads the foam to amplify energy return and provides optimal stiffness for toe-off propulsion.
• CloudTecelementsvisually honor On's signature design heritage.
  
• The 20mm stack height is legal for World Athletics.

OUTSOLE

• Full length 6-pin spike platedelivers grip and power, with pins strategically placed for 800m-1600m events.
  
• Surface-gripping heel pad for unmatched traction in wet or dry conditions.

WEIGHT: 145 g | 5.1 oz

The midfoot shank offers torsional rigidity, providing stability without compromising flexibility, running in snow.