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From the Blog

June Webinar Recap: Natural Fibers for Upholstery with Karsten Siewart

June 17, 2025 6:33 AM | Scott Hall (Administrator)

by Nicole Neder

In June, the National Upholstery Association hosted a webinar featuring Karsten Siewart, discussing the natural fibers used in the upholstery industry.


Natural fibers are preferred for upholstery for the following reasons: 
  • Eco-Friendly: Natural fibers come from renewable resources that are biodegradable and sustainable. 
  • Breathability and Comfort: Natural fibers are highly breathable and comfortable 
  • Durability and Longevity: Natural fibers are durable and long-lasting 
  • Hypoallergenic Properties: Some natural fibers are hypoallergenic 
  • Timeless Elegance and Versatility: Natural fibers offer a timeless and versatile look
What Was Covered
  • The differences between natural latex foam and synthetic foam
  • Stages in product lifestyle – the 3 R’s
  • Sources for natural materials 
  • Various certifications/organizations involved in distinguishing natural products from synthetic 
  • Plant and animal-based products
  • Reuse and recycling options

About the Presenter

Karsten Siewart was born and educated in the Netherlands. He has worked for decades in the mattress and furniture industry, both in Europe and the US. He is currently based in North Carolina. Karsten is a Sales Representative for ENKEV USA.

Missed the National Upholstery Association’s June Webinar? Click here to watch it!

Stay tuned for upcoming NUA webinars and educational opportunities by visiting our Events Calendar and subscribing to our newsletter



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