The majority of our beds will arrive as a rolled mattress and a folded cover, so you’ll need to put the cover on when it arrives. Pillow style mattresses and bolster pillows should be shaken out a bit when first unrolled to help them fluff up faster. Beds without separate covers, such as the Tough Rip-Stop Dog Crate Pad or Deep Den Dog Bed, only need to be unrolled from their packaging before they’re good for use. The Chew Proof Armored dog beds come pre-assembled, and the elevated ones only need to have the legs screwed into the corners (by hand, no tools needed) before they can be used. Our rectangle bolster beds come in three parts—a bottom mattress, a bolster pillow fill, and a cover with two compartments. Unzip the cover’s outer zipper and locate the inner compartment’s zipper. Unzip this inner compartment fully and insert the bolster pillow with the yellow side up, making sure the pointed ends poke through the openings at each end of the compartment. Then zip the inner compartment up, set the mattress on top with the yellow side facing up, and zip up the cover’s exterior zipper. Then flip the bed over and it’s good to go!