Body: 1.5mm 85% Yulex® natural rubber/15% synthetic rubber by polymer content, lined with high-stretch 100% recycled polyester jersey. Exterior: 88% recycled polyester/12% recycled spandex. Impact panels: 25mm EVA foam. Natural rubber is from sources that are Forest Stewardship Council® certified by Preferred by Nature™. Made in a Fair Trade Certified™ factory