Sleeves are generally long-sleeve styles. Fit varies by listing, ranging from a more fitted cut to a classic, roomier fit depending on the product.
The waffle fabrics are described as lightweight and are noted in several listings to be breathable.
Care instructions consistently state machine wash and tumble dry.
Extra warmth comes from footed/footie styles and the waffle fabric construction; footwear-style feet and the fabric's texture are noted as adding insulation.
Some Sleep 'N Plays are described as single-layer construction, and footed (cozy/footie) options are available to provide additional coverage and warmth.