The Le Mystere Essentials Boyshort is made of a wonderful microfiber and cotton knit. This fabric is as light and comfortable as your favorite T-shirt. The Le Mystere U125 is totally seamless, and will not show under your clothing. The stretch croth is breathable and prevents the boyshort from uncorfortable "riding up". This Boyshort is another great match for the Le Mystere Tisha , Dream Tisha and Florence Nursing Bra as well!