• BIAFO T-shirt 100% Mérinos 150g — Grey Volcano
  • BIAFO T-shirt 100% Mérinos 150g — Grey Volcano
  • BIAFO T-shirt 100% Mérinos 150g — Grey Volcano
  • BIAFO T-shirt 100% Mérinos 150g — Grey Volcano
  • BIAFO T-shirt 100% Mérinos 150g — Grey Volcano
  • BIAFO T-shirt 100% Mérinos 150g — Grey Volcano
  • BIAFO T-shirt 100% Mérinos 150g — Grey Volcano
Our model is 184 cm tall and wears size M.
He weighs 78 kg and wears size M on top and size M on the bottom.

BIAFO T-shirt 100% Mérinos 150g

Technical base layer 100% merino (150g/m²)

90 €
90 €
Colour : Grey Volcano
Size : S - EU : 46 / US : 36 Guide
Our model is 184 cm tall and wears size M.
He weighs 78 kg and wears size M on top and size M on the bottom.
In stock. Delivered as early as
Pay in 3 interest-free instalments with Alma on orders of €100 or more
Secure payment
Fast delivery and easy returns

The BIAFO is made in Europe from Italian merino fabric, using wool sourced from New-Zealand. Its 17.5-micron merino wool, around four times finer than a human hair, helps naturally regulate temperature and control odours during sustained activity. Raglan sleeves and flat seams minimise bulk at the shoulders under a backpack. Its slim fit moves with you: a breathable technical t-shirt for hiking, trekking and multi-day adventures.

Discover the AYAQ guarantee

Weight : 127 g

Performance

Warmth9 / 10
9 / 10
Breathability10 / 10
10 / 10
UV-protection10 / 10
10 / 10
Merino wool10 / 10
10 / 10
Lightness10 / 10
10 / 10

Activities

  • 10/10 Mountaineering
  • 10/10 Ski touring
  • 10/10 Alpine skiing
  • 10/10 Hiking
  • 7/10 Everyday wear
Functional details

Design & Sourcing

European natural fibers: Use of virgin wool produced in Europe, ensuring optimal and durable technical quality.

Ergonomics & Performance

  • Absolute softness: Premium knit made from extra-fine yarn for a soft, non-itchy feel, even directly on the skin.
  • Thermal regulation: Natural properties of merino wool providing optimal moisture and body temperature management.
  • Natural Odor Control: Intrinsic antibacterial properties of high-quality virgin wool, ideal for extended multi-day use.
  • Freedom of movement: Raglan sleeves and stretch knit structure offering excellent elasticity and breathability during activity.
  • Ergonomic crew neck: Comfort suited for both effort and rest. Features a fine elastic band for precise fit and enhanced durability.
100% eco-designed collection

Your Merino wool comes from farms with free-range animals and no mulesing. 100% of processing (combing, carding, spinning, dyeing, weaving...) is done near the Alps. Final assembly is in a European workshop powered entirely by green energy.

Material composition

  • Main fabric: 100% virgin Merino wool

Portuguese fabric made from New Zealand wool

  • Extra-fine 17.5 micron yarn
  • Natural wool from sustainable, ethical farms
  • Certified non-mulesed wool
Care

Warranty, Care & Repair

Designed with meticulous care using technical, mountain-friendly materials, your Biafo t-shirt comes with a 3-year warranty.

Washing:

  • First 5 washes: Cold water only.
  • Subsequent washes: Gentle cycle (max 30°C).
  • Preparation: Wash garment inside out.
  • Detergent: Use wool-specific detergent.
  • Spin: Avoid machine spinning and never wring the garment.

Drying:

  • Method: Air dry flat or on a hanger.
Fast delivery and easy returns

Delivered as early as

Estimated delivery times: 2–5 working days in France and 4–8 working days in the rest of the eurozone. Free delivery on orders of €80 or more; €4 for orders below this amount. Returns are accepted within 30 days of delivery and are free within the European Union and Switzerland, with a prepaid label.

CONCEPTION

EXTRA FINE THREAD

Jersey made from extra fine yarn for a soft, second-skin feel that doesn’t itch and protects against UV rays

ODOR CONTROL

COMFORT

Natural properties of high-quality virgin Merino wool that prevent odors and allow multi-day outings

ODOR CONTROL

COMFORT

Natural properties of high-quality virgin Merino wool that prevent odors and allow multi-day outings

RAGLAN SLEEVES

TECHNICAL PERFORMANCE

Raglan sleeves for maximum freedom of movement and enhanced comfort

TECHNICAL KNIT & CREW NECK

PRACTICALITY

Technical knit offering stretch and breathability, ideal for long, demanding hikes, combined with a crew neck featuring a fine elastic band for perfect fit and durability

TECHNICAL KNIT & CREW NECK

PRACTICALITY

Technical knit offering stretch and breathability, ideal for long, demanding hikes, combined with a crew neck featuring a fine elastic band for perfect fit and durability

You may also like

Men - Size guide

Enter your measurements in cm. You can leave a field blank if you don't know the measurement.

These measurements are neither sent nor stored.

Size guideSMLXLXXL
EU46 / S48 / M50 / L52 / XL54 / XXL
US36 / XS38 / S40 / M42 / L44 / XL
Height (cm)171 - 175175 - 179179 - 183183 - 193193 - 197
Chest circumference (cm)95 - 9899 - 102103 - 106107 - 110111 - 114
Waist circumference (cm)81 - 8485 - 8889 - 9293 - 9697 - 100
Hip circumference (cm)96 - 99100 - 103104 - 107108 - 111112 - 115
Schéma de mesure pour homme

Comment bien mesurer pour choisir vos vêtements AYAQ ?

1
Chest circumference

Measure horizontally around the fullest part of your chest.

2
Waist circumference

Measure horizontally around the narrowest part of your waist.

3
Hip circumference

Measure horizontally around the widest part of your hips and buttocks.

View our fit guide

Not the right size?

You can exchange your item for a different size free of charge within 30 days of delivery. For more information, visit our page Refund policy.