EUC Merino wool bra For those who need some extra room—the Essential Busty Bra is a low-impact style, designed for C-cup sizes or larger, created with our signature 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, while maximizing mobility. Convertible straps let you wear it straight or modify as a cross-back for additional support. Supportive without being restrictive, our Busty Bra reminds you how comfortable it feels to be in your own skin. ZQ, OEKO-TEX 100, and RWS certified Merino is also regenerative and sustainable. (which also means it is BPA free, PFAs Free, and toxic free).