Terms You Should Know
If some of the tech talk in shoe reviews feels like another language, here’s a quick glossary of the stuff you’ll see throughout this guide:
STACK HEIGHT – The total amount of cushioning between your foot and the ground, measured at heel and forefoot. Higher stacks = more impact protection, often at the cost of ground feel.
DROP – The height difference between the heel and forefoot. Higher drops (8–12 mm) shift weight forward; lower drops (0–6 mm) promote a flatter stance and can change the load on your legs.
MIDSOLE FOAM – The cushioning material underfoot. Common types include EVA (traditional, durable), supercritical foams like PEBA (ultra-light, bouncy), TPEE-based blends (responsive but a bit firmer), and brand-specific versions like Brooks DNA Loft v3, Adidas Lightstrike Pro, Saucony PWRRUN PB, or Puma Nitrofoam.
ROCKER GEOMETRY – A curved sole shape designed to help you roll forward smoothly, reducing the work your legs do with each step.
STABILITY FEATURES – Design elements that help control excessive inward or outward foot motion. Can be “traditional” (firm medial posts) or “stable neutral” (wider base, sculpted sidewalls).
OUTSOLE RUBBER – The grip layer on the bottom of the shoe. Carbon rubber is denser and longer-wearing; blown rubber is lighter and softer. Some brands use proprietary blends like Continental (Adidas), Puma Grip, Goodyear (Skechers), or ASICSGRIP for extra traction.
UPPER – The fabric and structure that holds your foot. Engineered mesh, knit, and jacquard uppers balance breathability, support, and comfort.
