Backpacks Mens Patagonia Fieldsmith Roll Top Pack Black. The description of this item has been automatically translated. Patagonia Fieldsmith Roll Top Pack Backpacks Black Available in men’s size. Main fabric: 600 denier 100% recycled polyester with PU coating and PFC-free DWR finish (durable water-repellent coating without perfluorochemicals) Lining: 100% recycled polyester..