Leather vs Synthetic Sandals: Does the Material Actually Affect Your Foot Health?

When people choose sandals, most think about style first and material second. But as a podiatrist, the material your footwear is made from has a real, measurable impact on foot health — not just how long the shoe lasts. Here's what's actually going on.

What's really going on

Leather and synthetic materials behave very differently against skin, and that difference matters most in warm weather when feet sweat more.

Leather is a natural, breathable material — it allows moisture to pass through and regulate temperature, which helps prevent the damp environment that fungal infections and skin irritation thrive in. It also moulds gradually to the shape of your foot with wear, which can reduce friction points over time.

Synthetic materials (PU, PVC, and similar plastics) don't breathe in the same way. Moisture gets trapped against the skin, which increases friction, blistering, and — for anyone prone to fungal infections like athlete's foot — creates a more favourable environment for them to develop. Synthetics also tend to hold their shape rather than mould to the foot, so pressure points stay fixed in the same place with every wear, rather than softening.

Myth-busting

"Synthetic materials are just as good if they're well made." Build quality affects durability and comfort, but it doesn't change the fundamental breathability difference. A well-constructed synthetic sandal will still trap more moisture than a leather one of equal quality.

"Leather is only better because it looks and feels more premium." The perception of quality is real, but it's not just cosmetic — the functional breathability and molding properties are measurable, not just aesthetic preference.

What to actually look for in sandal materials

• Full-grain or top-grain leather for the upper, where it contacts skin
• Natural or cork-based footbeds, which also breathe and mould over time
• Stitched or riveted construction rather than fully moulded plastic, which tends to hold sweat
• If synthetic is unavoidable (e.g. for water shoes), look for perforated or mesh panels to offset the lack of natural breathability

A podiatrist's recommendation

For everyday summer wear, especially if you're prone to sweaty feet, blisters, or fungal infections, leather is the better choice for anything that sits directly against skin. It's a small material decision that has a real effect on comfort and skin health over the course of a season, not just how the sandal looks after a year of wear.

This is one of the reasons Moffootwear sandals are made from leather rather than synthetic alternatives — alongside the podiatrist-designed footbed, it's part of building a sandal that supports foot health, not just foot fashion.