Common indoor styles include enclosed/cave beds, bolster or donut-style beds, and flat mat or pillow beds.
Features that promote warmth and a calming space include enclosed or burrowable designs, deep bolstered edges that create warm pockets or a self-warming effect, and plush faux-shearling or long faux/vegan fur surfaces.
Some beds include non-skid or gripper bottoms to prevent shifting and help keep the bed in place during use.
Support features include orthopedic bottoms, foam or polyester-filled cushions, and high bolster walls that offer head and body support.
Some beds use recycled filling or advertise recycled content—for example, listings mentioning 100% recycled poly-fiber fill and explicit sustainability or 'contains recycled content' notes.