To ensure the best fit and performance from your Wonderbra T Shirt Bra, begin by adjusting the shoulder straps to sit comfortably without digging in. The band should fit snugly around your torso, parallel to the floor, with enough room to slide two fingers underneath. The adjustable criss-cross straps can be unhooked and re-hooked into a crossed position on your back for added support or to accommodate racerback-style tops. This bra is highly compatible with most everyday clothing, especially t-shirts, thin sweaters, and button-down shirts, where a smooth, invisible finish is desired. For care, it is generally recommended to hand wash delicate items like bras in cold water with a mild detergent. Gently squeeze out excess water, reshape the cups, and lay flat or hang to air dry. Avoid using a machine dryer, as high heat can damage elastic and foam. Info needed: Always check the specific care label for detailed material-specific washing instructions.