Osa designed to survive both wet weather & sun exposur
Made from heat-treated pine able to withstand the harshest environmental conditions, the Osa Outdoor range by Henrik Tjaerby is explicitly functional and purposefully elemental in its design.
The Osa Dining Chair is intended for use alongside our Osa Outdoor Table, sharing the same proportions and distinctive seating planks.
It is tough; designed to survive both wet weather and sun exposure, and reliable; timeless seating from which to enjoy many summers. This is a chair with limitless potential that needs little explanation, says Tjaerby.
Made in Finland of Finnish pine.

All Vaarnii products are made locally by a small number of expert Finnish makers. All pinewood is harvested from sustainably managed Finnish forests.
Our outdoor products are made of heat-treated pine, Lunawood ThermoWood®. Thermowood is a non-toxic material produced by using only heat, and steam. The heat treatment makes the furniture weatherproof, so no other surface treatment is required. If you wish, you can treat your Osa furniture with natural wood finishes for the exterior (such as decking oil), which can help keep the product clean.
Products will start reacting with UV light very quickly and begin changing colour towards a beautiful silver tone once unboxed. The products will reach their final color after approximately one year outdoors. Ask us for a sample piece of the aged thermowood at info@vaarnii.com.
Although our pine wood is the hardest soft wood you can find, it will dent and scratch over time. We ask you to embrace these characterful signs of aging.



More designs from Vaarnii:
Introducing the 001 in Black Vaarnii’s first designs by Fredrik Paulsen for Vaarnii
The 001 Dining Chair and 001 Stool by Fredrik Paulsen — are now introduced in …
Maasto Collection Grows: Vaarnii and Ronan Bouroullec Launch Tables, Bar Stools and Black Pine Finish
Vaarnii expands Ronan Bouroullec’s Maasto collection at 3 Days of Design 2025 with dining tables, …
Brutal & Sophisticated Lounge Chair design by Max Lamb – Vaarnii
The Lounge Chair by Max Lamb is a tough piece of furniture Yet a hard-as-nails …
Light and Wood in Perfect Harmony: The Hoop Vision design by John Tree – Vaarnii
Hefty solid pine and fine veneer contrast and combine in the Hoop Table Lamp The …
Vaarnii introducing Aamu Bed Frame from reassuringly hefty slabs of Finnish pine
Aamu Bed Frame The Aamu Bed Frame is an effortless but essential object for those …
The Peace Chair nods to archetypal Adirondack chairs of the past – Vaarnii
Introducing 015 Peace Outdoor Lounge Chair and Footstool With extreme proportions and explicit ergonomics, this …
Osa Outdoor Dining Chair design by Henrik Tjaerby for Vaarnii
Osa designed to survive both wet weather & sun exposur Made from heat-treated pine able …
Hans Pendant XL design by Hans-Agne Jakobsson for Vaarnii
The Hans Pendant XL delivers a substantial dose of iconic design by Hans-Agne Jakobsson Big, …
Hans lights are handmade in Finland by Hans-Agne Jakobsson for Vaarnii
Hans lights are handmade in Finland from a combination of solid pine wood and the …
Vaarnii Introduces the 001 Stool: Fredrik Paulsen’s Essential Design
The 001 Stool is essential, immediate, resilient. Like the Dining Tables and Chairs before it, …
Kolmio Dining Table Made in Finland in slow grown, solid Finnish pine, by Cecilie Manz – Vaarnii
Kolmio Dining Table / Kolmio Bench Made in Finland in slow grown, solid Finnish pine …

