The Swivel Chair offers uncompromising comfort through its commitment to ergonomics, which influenced every aspect of its design. The chair was Wegner's solution to a doctor's critique which claimed that Danish design did not paying enough attention to ergonomics, thus allowing furniture to be designed that was not optimal in the way it interacted with the human body. The wood used in PP502 has been cut from newly felled trees, which must be at least 150 years old in order to be the right size. It is then left to dry for up to 2 years, in a highly controlled environment until the humidity is down to no more than six percent. While this meticulousness may seem unnecessary on the surface, it is a testament to PP Møbler's refusal to accept anything less than perfection.