Crafted with KAVU heritage elements, the Kopachuck is a blend of both 600D polyester and 12oz cotton canvas. The fold over top with magnet closure keeps items secure, but also gives flexibility for fitting bulkier items - even a puffy jacket...we tested. Pockets inside and out to organize your smaller essentials. Pack up your field guide, water bottle, snacks and even your packable puffy jacket; KAVU Days Ahead! Cross body bag with adjustable webbing shoulder strap and metal hardware, main compartment with fold over top and two magnetic snap adjustable closure options, front metal d-ring with pattern webbing loop, internal zip pocket and two stash pockets