Case Tanso 3-seat sofa in FSC-certified solid wood, designed by Shin Azumi, British design.
Sustainability verified

Tanso 3-Seat Sofa

Case
Sale price$3,005.00 Regular price$4,299.00
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The Tanso 3-Seat Sofa is a generous, design-led outdoor sofa that balances robustness with quiet elegance. Designed by David Irwin, the piece draws from Japanese furniture traditions, focusing on clarity of structure and purposeful construction. Made from solid teak, the frame is highly durable and weather-resistant, while the refined joinery and proportions give it a sophistication rarely found in outdoor furniture. Crafted with teak, it's part of Case's commitment to sustainable, long-lasting outdoor living.

It’s equally suited to open gardens, covered terraces, or indoor spaces that call for relaxed, natural materials. With its wider scale, the Tanso 3-Seat Sofa anchors larger outdoor seating arrangements and pairs beautifully with other Tanso pieces or mixed teak furniture. The grey outdoor cushions are breathable, comfortable, and easy to clean—ideal for long afternoons outside or effortless indoor lounging. Designed to transition between environments, the Tanso 3-Seat Sofa embodies sustainable furniture principles through material longevity, thoughtful design, and everyday usability. Available at Comosum.

Case Furniture is a pioneering British brand that seamlessly blends modern design with sustainability and high-quality craftsmanship. Founded in 2006 by industry visionary Paul Newman, Case has transformed the furniture landscape by making exceptional, eco-friendly design accessible to everyone. Collaborating with renowned designers like Matthew Hilton, Robin Day, Shin Azumi, and Eleanor Pritchard, they create timeless pieces that elevate any home. Each product balances style and function, utilizing modern manufacturing techniques and carefully sourced materials—including recycled components and FSC-certified wood—ensuring you never have to choose between quality and price.

Committed to ethical practices and environmental responsibility, Case partners with top factories worldwide that uphold fair wages and excellent working conditions, many boasting certifications for their sustainable methods. Their dedication to durability means crafting furniture designed to last a lifetime, embodying the belief that longevity is the ultimate form of sustainability. With a global presence through esteemed retailers like John Lewis, Design Within Reach, Liberty, and Heal’s, Case Furniture continues to shape the future of sustainable living. Experience the fusion of timeless design and eco-friendly innovation with Case—where sustainable furniture isn't just a choice, but a commitment to a better world.

Ships within 2 week

2 Year Warranty

Cushions made in Vietnam Wood Frame made in Thailand

To prolong the life of the product and retain its appearance and functionality, This unit is manufactured from solid wood. Craftsmen manufacture this product and there is variety between each unit. This is because wood is a natural product, with natural colour and grain variations.
Natural timber is affected by sunlight; this can can the wood colour to darken. It is recommended that no abrasive cleaners or solvents are used to clean the unit.

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From responsible materials to skilled hands - watch how quality is created

FDB Møbler: Danish Craftsmanship

See how timeless Danish design comes to life from raw FSC-certified wood to finished furniture.Highlighting the heritage of FDB Møbler, this video takes you inside the workshop where classic Danish modern pieces are produced with sustainable materials and meticulous attention to detail — rooted in a legacy of design since 1942.

Ethnicraft: The Journey of Solid Wood

From sustainable forests to finely crafted pieces — the making of Ethnicraft furniture.Discover Ethnicraft’s global production process as wood is selected, milled, and shaped across specialized workshops to create signature furniture that blends traditional woodworking with contemporary design.

Greenington: Bamboo Furniture

From forest to finished piece — the sustainable craft of Greenington bamboo furniture.This video showcases how Greenington uses responsibly harvested bamboo and certified eco-friendly processes to create durable, beautiful furniture while minimizing environmental impact.

Made to last chosen with intention.

Comosum's Ethos

At Comosum, we don’t just list any product; we meticulously curate them. Every piece at Comosum is selected for its quality, responsible materials, and long-term use in real homes. That means no throwaway items, no fast furniture, and no hidden shortcuts in craftsmanship. When you buy from us, you’re choosing pieces built to last, made by makers who stand behind their work so you can feel confident bringing them into your home.

Free shipping

Free delivery on eligible orders.

Customer service

Real help from real people here when you need us

Thoughtful Design, Honestly Made

We work with trusted makers who build quality pieces made to last.

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Share good design & get rewarded

Secure payment

Protected checkout with encrypted payment processing