On Cloudboom Zone

The On Cloudboom Zone is a speed training shoe that uses a full race foam midsole to deliver a fast and fun ride. Priced at $210, it's more expensive than category peers like the Hoka Mach X2 ($210) and Brooks Hyperion Max 2 ($180), but it's a slightly different shoe than those mainstream hits. While the big brand plated trainers are designed to blend comfort and speed for long miles, the Cloudboom Zone has much more aggression in its DNA. It feels snug and serious on foot, and the foam is aggressively bouncy in all the right ways. It's a shoe that rewards pace and makes you want to dig deep. This is a great choice for runners who want a fast workout shoe for track days or interval work. After one test run in the shoe, this is the rare case where we feel a high price tag is worth it. If you're looking for a more affordable option for speed sessions, check out the Adidas Takumi Sen 10 (firm and low-profile) or Nike Streakfly (soft, flexible, bouncy), both of which are 5k racing shoes that can typically be found for under $150. (Note: Stack heigh numbers are estimates based on our own testing. On has not provided measurements).