The cushions of the Saddle chair drape over both sides, forming flaps that look similar to horse-riding gear.
Angell, Wyller & Aarseth added an extra layer of material to the overhanging sections to create pockets for slim items.
Wool or leather upholstery also covers the seat and back, while the chair's simple square frame is available in oak or ash.
"By separating the generic solid wooden frame from the upholstery, the notion, or structure of the rigid construction is challenged by the comfortable and soft leather and wool," Christoffer Angell told Dezeen.
The chairs are handcrafted by furniture manufacturer Slåke in its small factory on the west coast of Norway.
"The whole concept seems to fit with the handcrafted production process and becomes more beautiful when used and worn," said Angell.
"My personal favourite is the ash version with natural coloured leather as these materials receive the light in a beautiful way, highlighting the purity of the subtle curves and profiles."
Oslo-based design collective Angell, Wyller & Aarseth comprises Christoffer Angell, Øyvind Wyller and Symen Arseth, all design graduates of Oslo National Academy of the Arts.
Previous projects include the Oslo chair for Bernhardt Design – a wooden lounge chair with a slung seat and back.