TIMBERLAND PRO. TB0A1VA9D97. 8 SERIES FLEX CANVAS WORK PANT. GUNMETAL GREY. Our 8 Series men s canvas work pants are designed to stretch and give you a flexible range of motion at the job site but they re comfy enough to wear off the clock too. 68 percent cotton 30 percent polyester 2 percent elastane GridFlex technical canvas. Breathable. Rugged and durable construction. Five pockets. Crotch gusset. Seven belt loops.