This top is made from 85% Yulex natural rubber / 15% synthetic rubber (polymer content), a neoprene-free material with excellent stretch. The natural rubber is sourced from FSC (Forest Stewardship Council) certified forests by Preferred by Nature. Optimal for water temperatures of 18°C to 23°C (based on US California standards; add approximately 5°C for Japan). Made in a Fair Trade Certified factory. *Worn twice, but selling because the size doesn't fit.* Size: XL