The lightweight FUNCTION Ergo safety pants have ventilation zips on the back of the thighs, reinforced material on the knees, versatile front and side zip pockets and elastic inserts on the inner thighs. The FUNCTION Ergo Safety Pants are made of a hardwearing polyester/cotton material, making them both durable and extremely comfortable to wear. Developed with the tree care professional in mind, the pants meet the EN 381, Design A (front protection), Class 1 (3,900 feet per minute), cut protection standard.