From Filson:

Born in the rain-soaked forests of the Pacific Northwest, our Oil Finish Single Tin Pants are legendary for their unfailing toughness and weather protection. The canvas duck is fully saturated with water-resistant wax for maximum water resistance. It’s tight weave turns away brush and briars while withstanding abrasion for exceptional long-term durability. The cut is full and roomy through seat and thighs for ease of motion during active work and climbing. With seven belt loops, sagging at the waistband is minimized. For extra support or beltless use, they’re equipped with sturdy suspender buttons. Metal wreath-button waist closure. Zippered fly.

• Built with heavy-duty waxed canvas
• Double-stitched with bar-tack reinforcing
• Zipper-fly and metal wreath-button waist closure
• Roomy cut through seat and thighs
• Suspender buttons and seven belt loops
• Slight taper at cuffs