This soft, sweat-absorbent bra liner is your natural solution to so many problems! Go from work to gym without the sweat or worry. Comprised of durable fabric, it absorbs more than its weight, quickly wicking away uncomfortable and unsightly breast sweat. Designed for easy care, simply machine wash and allow to air dry. (Do not bleach, please do not use fabric softeners) Sizing: Choose based on your clothing size. Most people prefer the Bra Liner length to extend across the entire front of the chest. To determine which size you need, measure the distance between your arms going beneath the breasts. This should be essentially half of your bra size. Please see the image of the sizing chart. The band is approximately 2" wide, increasing to approximately 4" in the front center of the band.