For big kids who are getting serious about running. The On Cloudsurfer Youth is built with CloudTec Phase(TM) and extra outsole grooves for smooth, flexible strides on everyday runs. Features CloudTec Phase(TM) adapted for bigger kids Extra grooves in the outsole for flexibility TPU toe cap for protection Breathable, supportive upper Rubber outsole for a solid grip Smooth, soft sensation underfoot Upper Engineered mesh that provides comfort, breathability and support. 8 mm heel-to-toe drop. Colorways BLACK/ECLIPSE A BLACK/RIVIERA A DOE/ORE A FROST/WHITE A ISLE/SHINE A VERDITE/IVORY Sizing Big kids&'; (youth) sizes: US 3.5-6.5, including half sizes. Made for ages 8-12.