On Running's Cloudboom Volt is a race-focused running shoe built for fast 5–10K and half-marathon efforts. It pairs responsive CloudTec® cushioning and a carbon-infused Speedboard® for energetic propulsion on race day. Key attributes: Gray | Grey | Polyester | CloudTec® cushioning for a fast ride | Double layer Helion™ HF hyper foam for energy return | Carbon-infused Speedboard® for propulsion | Lightweight, breathable mesh upper | Lace-up fastening | Secure fit | Rubber outsole for grip | Mesh panels | Round toe | Enhanced rocker for improved toe-off | Dimensions & fit: Weight: 210 g | Heel-to-toe drop: 5 mm | Regular. True to size. | Composition & care: Polyester