The Timbuk2 San Francisco Authority Laptop Backpack in all black is a medium-sized backpack designed for travel. Made of durable polyester material with a canvas fabric type, this backpack features a solid black color with a snap closure. The Timbuk2 brand is known for its eco-friendly designs, and this backpack is no exception. It also includes a nylon handle/strap material and plastic hardware for added durability. Ideal for men, this backpack is perfect for everyday use or for those on the go.