This undervest is designed to compliment and blend with our W30 full suit or Shorty wetsuits, but it works great as an extra layer under any wetsuit or semidry. • 2.0mm. • Superstretch. • 100% Microcell CR Neoprene. • Bonded High Quality Nylon thread. • Male and Female designs. • Colour: Black. • Sizes: 8x Mens and 7x Ladies. Follow the link for Size Charts Workbook for the W30 Sports Series (PDF)