Pillow Case
Proposed design for Slaapaap pillow cases illustrating the various polyphasic sleep patterns. Polyphasic sleep is a term coined by early 20th-century psychologist J.S. Szymanski, it refers to the practice of sleeping multiple times in a 24-hour period—usually more than two, in contrast to biphasic sleep (twice per day) or monophasic sleep (once per day).
http://www.slaapaap.com/?lang=gb
2012 / Information Design / Rotterdam / pattern / self-initiated / timeline