seam chaise lounge


Combine is a seating system of reduced form characterized by the profile of the lower side of the backrest. Depending on the choice of wooden legs finish and optional cushions, the style and the application context of Combine vary, enabling the user to define his or her own preferred character of the sofa.


Structure:     plywood, metal frame
Suspension: elastic webbing
Seat & backrest:   HR foam, polyester wadding
Base:           metal + powder coating
Upholstery:   fabric / leather


Two Seater

Three Seater

Corner Unit

Sectional Sofa Part

Chaise Lounge


COM/COL Yardage

Kindly contact our sales office for details on COM/COL yardage information.

The Prostoria Seam collection is crafted on a made-to-order basis, with lead times 12-14 weeks.




resources & downloads
Seam Sofa | By Böttcher & Kayser

Seam is characterized by a unifying line which goes all over and draws the sofa’s shape. The visible seams, analogous to leaf veins define its organic structure. The straight outside outlines come in contradiction with the softness of the padded seat, armrests, and backrest. The thin feet, made of square section bent bar follows on from the seams, and bring lightness. Seam is a unique system of sofa regarding its inclined cut on sides. It makes it more welcoming just like its shape.


  • + Two Seater
  • + Three Seater
  • + Corner Unit
  • + Sectional Sofa Part
  • + Chaise Lounge
  • + Ottoman

Technical Info

Structure: plywood, metal frame
Suspension: elastic webbing
Seat & backrest: HR foam, polyester wadding
Base: metal + powder coating
Upholstery: fabric / leather

resources & downloads

Böttcher & Kayser

Moritz Böttcher and Sören Henssler founded their Berlin-based design studio in 2007. In 2013 the designer Nikolaus Kayser joined the team. Since 2014 the trio is working under the studio name Böttcher Henssler Kayser in the fields of consumer product, furniture, and lighting design with companies such as ANTA, Böwer, Mater, Normann Copenhagen, Scantex, Schönbuch, Vertigo Bird and Zero. The designers were honored with a number of distinctions like iF and red dot design awards, the prestigious Red Dot „best of the best“ and the Interior Innovation Award 2015 for their sofa Seam produced by Prostoria.


We tend to perceive furniture as something abstract, created on designers’ desks and then produced, branded and placed on the market by companies with different statuses and reputations. In fact, relations inside the contemporary globalized furniture industry are becoming more and more fragmented with less and less opportunity for complete dedication to synergies and collaborations… Prostoria, as a young company whose catalogue already comprises some new icons such as the Polygon armchair and the Revolve transformable sofa, stands as an example of a different and more traditional approach based on the evolution from the local factuality and logical clustering of all actors involved in the production process.

Rapid development of Prostoria, formerly known as Kvadra, a company which has come a long way, from “starting from zero” to positioning itself as the leader and promoter of new ideas in only a few years time, is a story about the reintroduction of continuity both in Croatia and Central Europe, a region with vital but insufficiently recognized design scene and remarkable tradition and knowledge of the furniture industry. Those elements served as latent potentials that provided grounds for continuation and had to be activated.

Since the beginning, Prostoria has been developing an integrative approach, functioning as a collaboration platform that nourishes and stimulates continuous exchange of knowledge and experience between all the actors participating in the production of furniture. A dynamic workshop ambience has been created offering opportunities mainly to young designers to explore their ideas in excellent conditions and bring them to the highest level of design, functionality and technological artisanship. Many products have been developed over longer periods of time surpassing a number of iterations until reaching their final form, which would be impossible without the adequate support combining the contemporary technology and meticulous craftsmanship and handwork of the highest quality. Predominantly local materials are used, especially solid wood, and most of the production takes place within the company itself or in collaboration with local cooperatives.

While the company’s catalogue also offers furniture based on tested models, Prostoria shows strategic and even passionate dedication to research-based design, convinced that authenticity has its place on the market but presents a special challenge in the times when it seems almost impossible to create truly innovative and fresh concepts. For that reason, Prostoria’s social responsibility and specific position have to be observed as a contribution to the evolution of design and readiness to take the risk in order to reach new values for the benefit of users and the culture. Thus, Prostoria stands as a project inside of which designers grow together with the company on the grounds of mutual trust and shared goals.

You may also like…