| Single-Piece Lounge Chair | Rotomolded polyethylene, commonly linear low-density polyethylene (LLDPE) | One-piece shell with a reclined seat and integrated arms | Seamless shell, rounded edges, and few places for dirt or water to collect | Check seat depth, back angle, and overall size; a one-piece shell may be bulky to move or store | Patios, poolside areas, casual indoor seating, and flexible-use spaces |
| Straight-Back Dining Chair | Rotomolded polyethylene; some designs combine the shell with metal or molded-plastic legs | Upright seat with a relatively compact footprint | Supports an upright sitting position and is easier to arrange around a table than a deep lounge chair | Verify seat height, leg construction, and stability on the intended floor surface | Outdoor dining, cafés, break areas, and multipurpose rooms |
| Stackable Side Chair | Rotomolded polyethylene, sometimes with a reinforced base or separate frame | Simple, space-efficient form designed to nest or stack when compatible | Can reduce storage space when the design is specifically made for stacking | Confirm the permitted stack height and whether stacking may scratch or deform the chairs | Events, classrooms, shared spaces, and seasonal outdoor seating |
| Rocking Chair | Rotomolded polyethylene shell with integrated or attached runners | Reclined seat with curved rocking runners | Provides a gentle rocking motion without requiring a separate upholstered frame | Check runner stability, floor compatibility, and clearance for the rocking arc | Porches, quiet outdoor areas, and relaxed seating spaces |
| Perforated or Open-Back Chair | Rotomolded polyethylene with openings formed into the shell | Ventilated back or seat; may have a modern or geometric appearance | Openings can improve airflow and allow water to drain, depending on their placement | Inspect opening edges and cleanability; large openings may be less comfortable for some users | Warm, humid, or splash-prone environments and contemporary outdoor settings |
| Weighted or Ballasted Chair | Rotomolded polyethylene shell with an internal cavity that may be filled or weighted | Often a substantial, sculptural form with a low center of gravity | Added weight can help the chair remain in position in exposed areas | Confirm whether ballast is included, how it is added, and whether the filled chair can be moved safely | Wind-exposed patios, public spaces, and locations where frequent movement is not required |