A t-shirt bra is a type of women's undergarment designed for everyday wear. It features smooth, seamless cups that provide a natural shape under clothing, making it ideal for wearing with fitted tops and t-shirts. The cups are often lightly padded to enhance comfort and support without adding bulk. These bras typically have adjustable straps and a hook-and-eye closure at the back, allowing for a customizable fit. Many t-shirt bras are made from soft, stretchy materials that provide comfort throughout the day. They come in various styles and colors, catering to different preferences and body types.