https://www.crazycrow.com/mountain-man-bags-and-pouches/haversack
Haversack
4524-202-025$38.99
Product Details
Commonly used by 18th & 19th century Longhunters, soldiers and travelers for carrying personal gear and food. Approximately 15" x 15" and made of heavy canvas with a shoulder strap and three-button closure for the flap.