Tsu - Armchair

Baleri-Italia_Tsu_armchair_CKR320_2026_01c

Tsu

Armchair

Claesson Koivisto Rune, 2026

Tsu is a lounge chair available in a wide range of finishes and upholstery options, that combines visual lightness with comfort through an essential structure and a welcoming seat. Its distinctive rear arch defines the silhouette and reinforces its graphic identity.

The Tsu lounge chair offers a moment of rest and relaxation while its design encourages contemplation and wonder. Its hyper-minimal expression is exemplified by the symbol-like arch shape in tubular metal added to the backrest. The arch forms the rear leg pair while also suggesting a brushstroke from East Asian calligraphy, from which the Tsu lounge chair derives its name. The front and rears legs lack any visible connection to each other, an intentional design that conveys a feeling of weightlessness. This gives the Tsu lounge chair an impression of almost floating above the ground, eliciting moments of wonder to those with a discerning eye and inquisitive mind. 

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Disassemblable

Disassemblable
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TSU

Lounge armchair with tubular steel frame painted with epoxy powders in the specified colours.
Inner shell in flexible cold- foamed polyurethane with metal inserts.
Non-removable cover in leather, eco-leather, Focus and Focus Melange fabric, customer leather (pc).

Armchair CKR320

Lenght: 76 cm
Depth: 74 cm
Height: 74 cm

Dimensioni_Tsu_CKR320

Finishings and coatings

Fabric

Infiammabilità x1 Infiammabilità x2 Materiale naturale

Fabric cat. B

Composition
100% Wool

Weight
660 g/m²

Height
140 cm

Martindale abrasion
100.000

Pilling (ISO 12945-2)
4

Certifications
100% ricyclable - EU Ecolabel Certificate
Oeko Tex Standard 100

Flammability Test
TB 117
BS 5852-1 Cigarette
UNI 9175 Class 1IM

Country of origin
New Zealand

Maintenance
Do not wash
Do not bleach
Do not tumble dry
Do not iron
Dry clean

Do not wash Do not bleach Do not tumble dry Do not iron Any solvent except tetrachlorethylene

Infiammabilità x1 Infiammabilità x2 Materiale naturale

Fabric cat. B

Composition
100% Wool

Weight
660 g/m²

Height
140 cm

Martindale abrasion
100.000

Pilling (ISO 12945-2)
4

Certifications
100% ricyclable - EU Ecolabel Certificate
Oeko Tex Standard 100

Flammability Test
TB 117
BS 5852-1 Cigarette
UNI 9175 Class 1IM

Country of origin
New Zealand

Maintenance
Do not wash
Do not bleach
Do not tumble dry
Do not iron
Dry clean

Do not wash Do not bleach Do not tumble dry Do not iron Any solvent except tetrachlorethylene

Leather

Infiammabilità x1

Leather cat. E

Composition
100% European bovine leather

Minimum thickness
0.9 mm

Maximum thickness
1.1 mm

Height
5 mq

Certifications
IMO MED FTP8

Flamability test
TB 117
BS 5852-0 Cigarette

Maintenance
Do not wash 
Do not clean with harsh products
Keep away from direct sunlight and from direct heat
Avoid contact between light and dark colours even between different materials
Regularly dust with a soft and dry cloth

Do not wash Do not bleach Do not tumble dry Do not iron Do not dry clean

Infiammabilità x1

Leather cat. E

Composition
100% European bovine leather

Minimum thickness
1.3 mm

Maximum thickness
1.5 mm

Height
5 mq

Flamability test
TB 117
BS 5852-0 Cigarette

Maintenance
Do not wash 
Do not clean with harsh products
Keep away from direct sunlight and from direct heat
Avoid contact between light and dark colours even between different materials
Regularly dust with a soft and dry cloth

Do not wash Do not bleach Do not tumble dry Do not iron Do not dry clean

Infiammabilità x1 Infiammabilità x2

Eco-leather cat. B

Composition
63% Polyurethane
29% Cotton
8% Polyester

Weight
480 g/m²

Height
140 cm

Martindale abrasion
150.000

Flamability test
BS 5852 Crib 5
UNI 9175 Class 1IM

Country of origin
Italy

Maintenance
Hand wash - normal
Do not bleach
Do not wring
Do not tumble dry 
Dry flat
Iron - low temp
Do not dry clean

Hand wash Do not bleach Do not wring Do not tumble dry Dry flat Maximum temperature 100C - 230F Do not dry clean

Infiammabilità x1

Eco-leather cat. C

Composition
100% Polyester

Weight
520 g/m²

Height
140 cm

Martindale abrasion
40.000

Pilling ISO 12945-2
5

Flamability test
TB 117
BS 5852-0 Cigarette

Country of origin
Italy

Maintenance
40 degrees washing
Do not bleach 
Do not tumble dry
Dry in the shade
Iron - low temp
Do not dry clean

Water temperature 40C - 105F Do not bleach Do not tumble dry Dry in the shade Maximum temperature 100C - 230F Do not dry clean

Designer

Claesson Koivisto Rune

The Swedish architecture studio Claesson Koivisto Rune was founded in 1995 by Mårten Claesson, Eero Koivisto and Ola Rune. Today, it is an internationally renowned practice, working with both architecture and design, with clients in all corners of the world.

The first Swedish firm to exhibit in the international section of the Venice Architecture Biennale, 2004, Claesson Koivisto Rune has received an array of international awards, amongst them Red Dot Design Award – Best of the Best 2024, 2014 and 2013; Designer of the Year 2014 by Elle Decor Italia; Interior Designer of the Year 2021 by Elle Deco Japan; ‘Best Hotel Conversion’ for K5 hotel, Tokyo, in the Asia Ahead awards 2021.

In 2021, King of Sweden Carl XVI Gustaf presented Mårten Claesson, Eero Koivisto and Ola Rune with The Prince Eugen Medal for outstanding artistic achievement in architecture (2020). They have also been the recipients of the Bruno Mathsson Award (2015), the highest honour in furniture design in Sweden and the Scandinavian region.

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