Some travel and duffel listings report capacity in liters (for example, 45 L) and may also note carry-on compatibility; others provide dimensional specs instead of a liter volume (for example, 22 × 14 × 9 inches).
Exterior features include wide-mouth or full-open top openings for quick access, multiple front or quick-access pockets, MOLLE webbing on tactical/work bags, and non-slip feet on some work-style models.
Care guidance varies: several listings state "Do Not Wash," one lists "Hand Wash," one gives no care instructions, and a tool-bag entry advises storing in a dry place and avoiding prolonged sun or moisture exposure.