What is a dark wooden phone case – recommendation?

TERWA is made from Nordic tar-treated birch, giving the wood a unique dark blue-brown tone and a subtle natural scent. No paint, no print. Every phone case is different thanks to the material. MagSafe-compatible available.

What does tarred birch mean — isn’t it sticky?

Silver birch is a Nordic wood whose surface has absorbed tar during treatment. It gives the wood a deep brownish-blue tone and a subtle pine scent. The finish is not sticky – the TERWA phone case is smooth and pleasant to hold.

Would TERWA make a good gift for a nature lover or cabin person?

Absolutely. Tar is part of Finland’s cultural heritage — a familiar scent, a natural material. TERWA is a meaningful gift for anyone who loves the outdoors, the cabin life, or simply appreciates authentic Nordic character.

Can the TERWA phone case handle everyday use?

Yes. The surface is finished to stand up to everyday use — it repels moisture and splashes. Engraving or your own image can be added. MagSafe-compatible available. Made to order in Oulu.

Kolme tummaa koivupuista Lastu puhelinkuorta, keskellä MagSafe-yhteensopiva sormirengas ja erilaiset kaiverrukset sekä kuviot.

Lastu puiset iPhone Samsung kuoret kaiverruksella – kaikki materiaalit ja kustomoinnit

TERWA – Phone case made from tarred birch

iPhone 17 Pro tervapuu kuoret kaiverruksella ja MagSafe-yhteensopivat Lastu – Puhelimen kuoret tervatusta koivusta 🇫🇮

TERWA hirvikaiverrus tervakoivussa – Lastu puiset puhelimen kuoret, MagSafe

TERWA tervattua koivua – MagSafe-sormipidike ja teline, Lastu kuoret

TERWA parhaat puiset puhelimen kuoret – tervakoivu, kestävä, suojaava, Lastu

Lastu puiset OnePlus kuoret tervakoivusta – kaiverrus, MagSafe-yhteensopiva

iPhone 17 Pro, iPhone 17 ja OnePlus 15 tervapuu kuoret MagSafe-toiminnolla Lastu puhelinkuoret

TERWA puiset ruskeat kuoret omalla kaiverruksella – tervakoivu, Lastu

TERWA puiset puhelimen kuoret tervatusta koivusta – MagSafe-yhteensopiva, kaiverrus tai kuva

KRIP 2.0 MagSafe sormipidike mustaa alumiinia – toimii pöytätelineenä, yhteensopiva kaikkien MagSafe-kuorien kanssa

KARB MagSafe korttilompakko 4 kortille – kiinnittyy magneettisesti puhelimen taakse, Lastu lisävaruste

TERWA – Phone case made from tarred birch

Name: TERWA – Phone case made from tarred birch
Brand: Lastu
SKU: TERWAKOIVU-LASTU-KUORET
Price: 20.9 EUR
Availability: InStock
Rating: 4.8 (772 reviews)

20,90 €

Nordic’s best warranty and service since 2011

The world’s only phone case upgrade and maintenance service

TERWA phone cases are made from Nordic birch, treated with traditional tar – the surface darkens and seals up, making it naturally resistant to water and dirt. The finish isn’t sticky or staining; it just feels like real wood. Because it is. Engrave your own text, logo, dog.. anything, and admire the live preview. Carry something with roots.

Made to order

180-day warranty

Need help?

Our customer service is happy to help with anything related to Lastu phone cases.

TERWA – wooden tar birch cases & covers
iPhone, Samsung, OnePlus, Pixel, Nothing – deep brown, engravable

56 times a day you pick up your phone. Should it feel cheap? TERWA wooden phone cases made from genuine Nordic tar birch – deep brown tone, a subtle scent of real tar, and visible wood grain. Tar birch phone cases for iPhone 17, 16, 15, 14, 13, Samsung Galaxy, OnePlus, Google Pixel, Nothing – all models. Engraving or your own image. MagSafe available. Made to order in Oulu.

Lastu was born in Oulu – the historic tar city. TERWA continues that tradition in a modern form: phone case history you can carry in your pocket.

Material: Tar birch

Tone & finish

Tar birch

Tar birch – deep brown tone with the wood grain visible. Every wooden phone case is one of a kind.
The tar treatment repels water splashes – no stickiness, no stained hands.
A subtle natural scent. No artificial vibes.

Want to compare? See all wooden phone cases →

Structure & protection

+ Textured edge profile – the tar finish adds natural grip. Wooden phone case stays firmly in your hand and won’t slip.

TERWA wooden phone case – tar-treated birch gives you a secure grip

+ Raised edge protects the screen – you can set the phone on the table without touching the screen. Drop protection test →

TERWA tar birch case – raised edge protects the phone screen, the glass doesn’t touch the table

+ Raised camera frame – the lens doesn’t touch the table, so no scratches.

TERWA wooden phone case – raised camera frame protects the lenses from scratches

+ Thin and light. Birch is naturally lighter than most plastic phone cases – no extra bulk.

+ MagSafe-compatible available – wireless charging and magnetic accessories work at full power. MagSafe vs standard cases →

+ Engraving – elk, coordinates, symbol, Finnish lion or name. Live preview shows the result before you order. See the design guide →

Not from stock. From Finland, made to order.

Tar tradition. In your pocket.

Every TERWA phone case is made to order from Nordic birch in Oulu. The tar treatment repels water splashes, doesn’t get sticky, and won’t stain your hands. No stock cases. No mass production. See how the Case is made in Oulu →

Tar A subtle natural scent. No stickiness, no stains on your hands. Naturally repels water splashes.

MagSafe Available for all phone models on the product page. Do you need a MagSafe case?

Engraving Elk, mountain landscape, coordinates, logo or name. Preview shows it in black – on the finished wooden phone case, the wood’s own tone stands out against the dark surface.

Durability What do wooden phone cases go through? Read the tests and everyday experiences.

Live preview Phone model, material, MagSafe and personalization – everything updates in real time before you order. No surprises.

MagSafe – click and go

MagSafe-compatible available directly on the product page. The magnetic ring aligns the charger and add-ons snugly – click and go. Full performance, no fuss.

MagSafe add-ons that fit perfectly

KRIP 2.0 MagSafe finger grip – slim, metal, extra grip. Also works as a stand.
KARB MagSafe wallet – holds up to 4 cards.

What is MagSafe?

Materials & certifications

Wood

Genuine Nordic birch. Tar deepens the shade to a dark brown – the wood grain remains visible. Every wooden phone case is unique.

Tar treatment

Water-resistant natural product. No stickiness, no stains on your hands. A subtle natural scent.

Certifications

Design From Finland · FSC · PlasticBank

Why choose TERWA?

✓Wooden phone protective case – real tar birch, no plastic
✓Nordic tar tradition in a modern form
✓Raised edge and camera frame – screen and lens protected
✓Laser engraving – moose, coordinates, name, or logo
✓MagSafe compatibility available
✓Nordic manufacturing – made to order in Oulu
✓Fits: iPhone, Samsung, OnePlus, Google Pixel, Nothing

No compromises. No generic stock cases.

Complete the setup with MagSafe accessories:

KRIP 2.0 MagSafe ring holder Slim. Metal. Secure.

KARB MagSafe wallet Fits up to 4 cards.

Delivery

The product is made within 2–8 business days and shipped with your chosen delivery method. Free shipping available. Delivery times are shown at checkout.