S1 2-4

Classified as comfortable, the S1 features a simple inviting seat curve combined with soft foam. Designed by Pieter Jamart, the S1 is specified for building dynamic environments. Made from a solution to repel water, withstand elements and protect against sunlight, the chair can be used in outdoor spaces. The S1 is a comfortable solution for educational, healthcare and commercial spaces. Use multiple configurations of the sofa alone or combine it with other similar seats such as the S1 Elephant, S2 or S3 to build unique arrangements.

Starting at $1,587 list
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Classified as comfortable.

The S1 is available 30 standard FlexPlus™ colors and five different sizes. We are also able to meet your brand specific color needs with a custom color solution.

Approved Fabrics & Materials

FlexPlus™ coating provides options beyond traditional upholstery and is the brand’s key differentiator. FlexPlus™ is made up of three layers; polyurethane primer, polyurethane reactor (A/B), and color coat. The end product is rated for high-traffic areas and is 100% waterproof. Learn more about FlexPlus™ specifications including coating and colors.

SIXINCH® is proud to partner with the top textile companies in the industry to provide an extensive offering of fabrics. Fabrics can be specified using our standard ordering process, eliminating the need for additional expense and efforts required for COMs. Visit our Graded-In Fabrics page for more information on surface materials and pricing.

Additional Documents:
Fabric Guidelines (.pdf)
Material Durability (.pdf)
Care + Maintenance (.pdf)


SIXINCH USA’s goal is to reduce impacts to human and environment health by evaluation and control of chemicals of concern in our processes and facilities.

Comparing materials and chemicals found on the Red List we find that SIXINCH products meet the criteria for specification of Living Building Challenge buildings. The Living Building ChallengeSM 2.1 is a complex initiative and is not limited to compliance with a list of materials and chemicals, but clearly states the intent of environmental responsibility in product design and specification. For SIXINCH this is an on-going commitment and will involve continuous improvement.

We look forward to sharing more about our journey to even deeper sustainability. For more information visit our Environmental/Testing Information page.



Pieter studied Interior and furniture design at Luca’s fay’d herbe academy Mechelen Belgium. Passionate about the possibilities of furniture and foam, he started researching the material aduring his studies. After graduating in 2002, Pieter immediately started SIXINCH with his business partner Michel Sels.