Description from Branwyn website: The Essential Bralette is a low-impact bra for C or smaller cup sizes created from Merino to keep you comfortable and funk-free all day. Best for light activities and everyday wear, our underwire-free seamless design eliminates digging and rolling and maximizes mobility. Convertible straps let you modify it as a cross-back or wear it straight. Supportive without being restrictive, our Bralette reminds you how comfortable it feels to be in your skin. If you’re not sure about sizing, go one size up.