The keystone holds the arch, one of the oldest and strongest and of all architectural forms. The KEYSTONE lounge chair comprises three autonomous yet symbiotic elements: a concrete back that buttresses the spine, a gently curved ceramic arch for your sit-bone, and the wedge-shaped rubber voussoir that supports and completes the arch.

The chair was originally a 450-kilo sculpture, exhibited at a Milanese art gallery in 2014. Thomas Ibsen from PLEASE WAIT to be SEATED approached its Dutch designers, OS & OOS, and said, “Why not get this down to 30 kilos and upholster it? Turn it into a comfortable and practical piece of furniture?” He then teamed up with Kvadrat to use their exclusive Raf Simons design collection. The chair has since become a collectors’ item, sold to galleries and contemporary art showrooms across the globe.

A word of warning, though: it’s not just sit-bone friendly; kids love clambering all over it. So the chair gets our one-off label: PWTBSBTOYSFK (Please Wait to be Seated But Take Off Your Shoes First, Kids).

Origin Made in Denmark 

CODA 2
Peach/White/Grey
Kvadrat Textile

Raf Simons
Green/Pink/Grey
Kvadrat Textile

Size 91 x 80 x 86 cm / 36 x 31.5 x 34"

OS & OOS
OSCAR PEET and SOPHIE MENSEN at the Dutch design studio OS & OOS straddle the border between industrial-functional design and autonomous objects. Both 2009 graduates of the Design Academy Eindhoven, their work spans the space between concept, rationalisation and final aesthetic objective.