Fabric feel - light, soft, naturally breathable cotton silk jersey for all-day freshness, absorbent coverage and comfort. Fabric comfort benefit-the stretchy knit of this cotton jersey allows for complete flexibility and ensures all day comfort. Elastic benefit - covered inner elastic ensures there is no contact with anything but skin friendly cotton silk. It's a natural fiber that's breathable and soft, so it feels great against skin. The downside to cotton silk is it doesn't dry quickly, so if there's any moisture (e.g. from sweat) the fabric will stay wet.