A pillow includes a compressible fill material and a flexible shell covering the fill material. A track is at least partially embedded in the flexible shell, and a clip is slidingly engaged with the track. The clip defines an opening for attaching an item to the pillow. Various kinds of items may be attached. In another variation, a slipcover includes a flexible shell configured to conform to an outer shape of a particular pillow, and also includes a track at least partially embedded in the flexible shell. A clip is slidingly engaged with the track and defines an opening.