lightweight and highly durable cotton mix contruction for everyday comfort. Cordura reinforced knee, bottom hem and hanging pockets for long lasting durability. Crotch gusset for highly enhanced movement and durablility. Raised back for comfort and the perfect fit in any position. Reflective elements for added visibility and safety. Extendable leg length to accomodate varying body shapes. Adjustable kneepad position for a perfect fit to your line of work.