Mesh, Flyknit, EVA: What Your Sneaker Is Actually Made Of

Pick up any sneaker on this site and you'll see the same handful of materials listed: mesh, flyknit, EVA, TPR, rubber. They sound interchangeable. They aren't. Each one is doing a specific job, and knowing what that job is makes it much easier to pick the right pair for how you actually live.

The upper: mesh vs. flyknit vs. leather

The upper is everything above the sole. It decides how the shoe breathes, how it holds your foot and how it ages.

Engineered mesh is a woven or knitted textile with visible open pores. Air moves through it freely, which is why it's the default on running and training shoes like our Breathable Mesh Running Shoes. The trade-off is water: mesh lets rain in as easily as it lets heat out.

Flyknit-style knit is a single knitted piece rather than stitched panels. It stretches to fit like a sock and has no seams to rub, which is why it feels lighter on the foot even at the same weight. Our Flyknit Sport Sneakers use a thickened knit that adds structure without losing the sock-like fit.

Synthetic and real leather give up some airflow for durability and shape retention. They scuff rather than tear, hold their silhouette over months, and clean up with a wipe. If you want a sneaker that still looks sharp after a season of daily wear, leather-panelled uppers like our Commuter Sneakers are the safer bet.

The midsole: where comfort actually comes from

When people say a shoe is "comfortable", they're almost always talking about the midsole — the layer between your foot and the ground.

EVA (ethylene-vinyl acetate) is a foam. It's light, it compresses under your heel and springs back, and it's what makes a shoe feel cushioned on the first step. It does pack down over time; a well-worn EVA midsole is noticeably flatter after a year of daily use.

PU (polyurethane) is denser and heavier than EVA but lasts longer and keeps its bounce. You'll find it in chunky-soled styles like our Chunky-Sole Lace-Ups where the thick platform needs to hold its shape.

The outsole: grip and wear

Rubber is the classic. Sticky on pavement, resistant to abrasion, easy to clean. Natural rubber grips better; synthetic rubber lasts longer.

TPR (thermoplastic rubber) is a rubber-plastic blend. It's lighter and cheaper to mould into detailed tread patterns, and it's the standard on casual and commuter styles. It wears a little faster than pure rubber on rough surfaces, which is why it's paired with flat, low-impact designs.

Vulcanised soles are rubber that's been heat-bonded to the upper rather than glued. The bond is stronger, the sole flexes more, and it's the construction behind every classic skate shoe — including our Mesh Skate Shoes.

So which one do you want?

• Gym, running, hot weather: mesh or knit upper, EVA midsole, rubber outsole.
• All-day walking and commuting: mesh-and-synthetic upper, EVA or PU midsole, TPR or rubber outsole.
• Looks-first, lasts-longer: leather or synthetic-leather upper, PU midsole, rubber outsole.
• Wet conditions: avoid open mesh; look for synthetic overlays and a deeper tread.

Every product page on SoleSprint lists the upper, sole and insole materials in the spec list, so you can check before you buy. Still not sure? Ask us — we'll point you to the right pair.