Complex sentence: Newer variations of the swimsuit retained the distinctive seam lines, however had a separation of the skirt shape and a different shape of the support, which were more attuned to the needs of the wearer.
Split into simpler sentences: Newer variations of the swimsuit retained the distinctive seam lines. However, they had a separation of the skirt shape and a different shape of the support, which were more attuned to the needs of the wearer.