Covers are typically either zippered and removable or sewn closed. Many outdoor-style cushions list zippered, removable covers to make cleaning easier; others have fixed seams requiring spot cleaning.
Look for built-in attachment details such as ties or ropes, an elastic back strap, and non-slip backing. These elements help secure cushions to seats and reduce slipping.
Cushions are sold singly and in multi-piece sets (examples include sets of 2, 6, or 8). Common shapes include square and rectangular cushions for seats and longer rectangular lounger pads.
Cover fabrics commonly include olefin (100% olefin), polyester (100% polyester), and woven Oxford-style textiles. These materials are chosen for durability and outdoor performance.
Lounger pads commonly include sewn-on ropes and an elastic back strap to anchor the pad to the furniture. Some listings specify rope lengths (for example, about 11.8 inches) for tying to frames.
Portability varies by size and thickness. Some travel-friendly seat pads are described as lightweight — listings include examples around 3.0 pounds — while larger lounger cushions will weigh more. Check the product weight on individual listings to confirm portability.