Glossary.
The words you find on shoe spec sheets, explained without frills. Understanding these terms is half the work of choosing well.
- Drop
- The height difference, in millimeters, between heel and forefoot. A high drop (8–12 mm) eases the calf; a low one (0–6 mm) asks more of the foot but feels more natural.
- Stack
- The total height of foam under the foot, in millimeters. High stack = more cushioning and protection on long runs; low stack = more ground feel and responsiveness.
- Plate
- A stiff sheet (often carbon fiber) embedded in the midsole to add snap and propulsion. It’s the heart of “super shoe” racers.
- Foam (midsole)
- The cushioning material between foot and ground. PEBA foams are light and springy (racing); EVA is cheaper and more stable (training).
- Cushioning
- How much the shoe absorbs impact. Plenty of cushioning protects on long miles and recovery runs; little of it makes the shoe more direct and fast.
- Daily trainer
- The everyday shoe: versatile, durable, comfortable for most of your training. If you buy only one, this is it.
- Racer / race shoe
- Light, responsive, often with a plate and premium foam. Built for intervals and race day, not for daily volume.
- Stability
- Features (posts, wider geometries) that control excessive inward roll of the foot. Useful if you overpronate.
- Upper
- The top part that wraps the foot. Judged on breathability, hold and fit.
- Mesh
- The perforated fabric of the upper. An engineered mesh balances lightness, ventilation and support.
- Outsole
- The rubber in contact with the ground. On road, durability matters; on trail, it’s the lug pattern and grip.
- MSRP / list price
- The price suggested by the manufacturer. It’s the reference we use to compute the real discount on every offer.
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