Outdoor seat cushions most commonly use adjustable hook-and-loop (Velcro) straps and secure hook-and-loop connections. These straps are sized to fit furniture such as chaise lounges and are designed to hold cushions in place during use.
Velcro (hook-and-loop) connections provide adjustable attachment points that help the cushion conform to the furniture and stay put. When sized and positioned correctly (for example on chaise lounges), they secure cushions firmly and reduce shifting during use.
Cushions with Velcro connections use traditional fills such as 100% polyester or cotton, as well as higher-density foam cores (for example, 28D high-density foam) that provide resilience and quicker rebound.
Alongside hook-and-loop fastener straps, descriptions mention other closures such as sewn seams and button closures. Closure type varies by model and intended use.
Compression-packed cushions are typically described as fully expanding within about 24–48 hours after opening.