Free Shipping on Orders over $75 | 30 Day Easy Return | Gift Registry

View »

Have a question?
(800) 506-6541

Free Shipping over $75 | 100% Price Match | Flexible Payment Options

More images:

TNK Flex 50 Office Chair - High Back

Alegre Design for Actiu

Regular price $1,064.98

Add to Cart

Please select a fabric.

Gabriel Felicity

Composition: 100% Post-Consumer Recycled Polyester

Designer: Mette Krebs Petersen

Durability: 90.000 Martindale

  • 66161 (D13)66161 (D13)
  • 60999 (D12)60999 (D12)
  • 64190 (D11)64190 (D11)
  • 60105 (D15)60105 (D15)
  • 68179 (D14)68179 (D14)
  • 67079 (D16)67079 (D16)
  • 66162 (D18)66162 (D18)
  • 61161 (D21)61161 (D21)
  • 60106 (D22)60106 (D22)

Gabriel Step

Composition: 100% Trevira CS

Designer: Inger Mosholt Nielsen

Durability: 100.000 Martindale

  • 62057 (M91)62057 (M91)
  • 61149 (M90)61149 (M90)
  • 60090 (M92)60090 (M92)
  • 67072 (M78)67072 (M78)
  • 68120 (M94)68120 (M94)
  • 63082 (M71)63082 (M71)
  • 64013 (M75)64013 (M75)
  • 67007 (M76)67007 (M76)
  • 60999 (M12)60999 (M12)

Gabriel Step Melange

Composition: 100% Trevira CS

Designer: Inger Mosholt Nielsen

Durability: 100.000 Martindale

  • 66019 (M19)66019 (M19)
  • 68120 (M24)68120 (M24)
  • 64179 (M23)64179 (M23)
  • 60021 (M22)60021 (M22)
  • 61103 (M20)61103 (M20)
  • 68119 (M10)68119 (M10)
  • 67072 (M17)67072 (M17)
  • 62057 (M15)62057 (M15)
  • 60004 (M14)60004 (M14)

Savana Leather

100% First Quality Selected Cow Grain Leather

  • P18P18
  • P11P11
  • P10P10
*Digital swatches are not always color accurate. Please contact us for samples.
Free Shipping
over $75
Payment Options


26.5" W x 26.5" D x 43.5 - 50.25" H
Seat: 16.5 - 20.75" H x 16.5" D


Polyurethane Foam
Polypropylene Perimeter Frame
Gas Lift
Aluminum 5-Star Base

"If there is anything that characterizes a high-level office furniture manufacturer, it's the design and innovation of their more technical products. Research and innovation that takes into account the new uses and needs of today's society is what allows each new model to surpass the previous one, in terms of benefits and services. Investing in health is an investment in the future, in concentration, in efficiency and, as a result, productivity. All this is possible by investing in ergonomics." - Marcelo Alegre, Alegre Design

Numerous studies have shown that movement fosters creativity and improves productivity. TNK Flex marks an evolution in Actiu’s task seating thanks to its active ergonomics. All features have been designed to facilitate user comfort and concentration, thus facilitating each and every one of their movements. Starting with an excellent seat that provides stability, maximum support and balance comes the backrest that dynamically responds to human movements. TNK Flex allows for free movement of the body, which in turn reduces fatigue, stress and tension while increasing both performance and productivity. An ergonomic design based on user support and interaction.

We know that passion and consistency are keys to success, which is why at Actiu we develop new products that are the result of intense research whose main goal is to guarantee the comfort and ergonomics of work spaces, in addition to facilitating different postural options that can provide users with freedom of movement and can therefore improve the physical conditions of their job. Welcome to the age of well-being, at work.



Design Public is an authorized USA dealer for all Actiu products.

Entire Actiu Collection »

Designed by Alegre Design

All products from Alegre Design »

More from Actiu