From the manufacturer: You wouldn't usually think of a tank top as a year-round piece, right? Think again. Our linen tank is great to layer up when it's chillier, but stands alone on warmer days. Our linen is made from 100% European flax, which is more sustainable and less resource-intensive to grow. Linen is the ultimate temperature-proof fabric because it's breathable and naturally heat-regulating. DETAILS SIZE & FIT CARE Ethically woven from 100% European flax linen Breathable, durable, hypoallergenic, lightweight Button keyhole opening at back neck This material is certified by OEKO-TEX Standard 100 (Certificate Number: BJ050 139683) which ensures that no hazardous substances are present Made with care in Shenzen, China Size tag precedes measurements in photo order