Cotton vs Modal vs Synthetic
A side-by-side look at the three main underwear fabrics — and which GAGLI style matches each one.
Head-to-head comparison
| Property | Cotton | Modal | Synthetic (Nylon/Lycra) |
|---|---|---|---|
| Softness | Good | Excellent | Good |
| Breathability | Good | Very good | Engineered (very high) |
| Moisture handling | Absorbs | Breathes | Wicks |
| Stretch | Low without elastane | Moderate | High (4D) |
| Durability | High | Moderate | Very high |
| Best price point | Budget to mid | Mid to premium | Mid to premium |
Cotton: the everyday workhorse
Cotton is a natural cellulose fiber. It absorbs moisture, feels familiar, and is easy to care for. The downside of 100% cotton is that it can stretch out and stay damp. That's why GAGLI cotton styles add a small percentage of elastane — usually 6% — for shape recovery.
Modal: the plant-based silk
Modal starts as beech wood pulp and is processed into a smooth, breathable fiber. It is naturally anti-pilling to a degree, cooler to the touch than cotton, and drapes well. It is less durable than cotton, which is why our cotton-modal blend (GMU015) combines the two.
Synthetic: engineered for performance
Nylon and Lycra are petroleum-based polymers. They do not absorb water; they move it to the surface where it evaporates. That makes them ideal for sports. They also stretch far more than natural fibers and recover their shape faster.
Which one should you pick?
- Value + reliability: cotton (GMU006 / GMU017 / GMU018)
- Softness + breathability: modal (GMU003 / GMU004)
- Best of both: cotton-modal blend (GMU015)
- Training: nylon-Lycra (GMU009)