They’re typically made from metal/steel (including heavy-duty and stainless steel) and natural wood; several listings specify metal or stainless steel, and at least one freestanding gate is natural wood.
Installation methods include hardware-mounted (requires drilling for a permanent fit), pressure-mounted (no drilling), and freestanding foldable designs that need no mounting.
Common convenience features include walk-through doors, auto-close or gravity-close mechanisms, one-hand operation, two-way swing or stay-open options, and integrated latches for easy entry.
Playpens are described as portable and collapsible for travel and stacking, while freestanding wooden gates fold flat or accordion-fold for compact storage and easy room-to-room placement.
Playpens advertise all-weather metal construction with anti-rust protective coatings and plastic anti-slip caps on each panel to prevent sliding and protect indoor or outdoor surfaces.