Common materials include Polyester, 100% Recycled Nylon, PVC (Polyvinyl Chloride), Polyurethane, 100% Recycled Polyester, and cotton canvas.
Listings show fits up to 16 inches, up to 15.6 inches, up to 15 inches, and up to 14 inches; several options explicitly note there is no dedicated laptop pocket.
Capacities range from about 5.9 liters at the small end up to 26 liters at the largest, with many bags in the ~12–24 liter range.
Care instructions most commonly list spot clean or wipe clean for maintenance.
Weights range from about 0.5 pounds up to 2.13 pounds, with several common values in the ~0.8–1.5 pound range.