Fully adjustable straps and back make this the most comfortable sexy deep v-neck swim top ever made for busty women. Best part? No underwire and it's super supportive. Our 2" roll-resistant Superband under the bust combined with two layers of techno-fabric (think compression) nylon naturally lifts and holds everything in place. Our nylon recycled fabric is sustainably sourced from Italy. It's compression-like nature is due to it's composition of super plastics, much of this coming from commercial fishing nets pulled from the ocean as part of coral reef restoration efforts. (Seriously, a lot goes into making this fabric!) This patented process of regenerating industrial grade plastics (not just water bottles) into knit nylons that can stretch and bend with your every curve, is why we don't need underwire to support the curves. It's truly magical!