• MEFONNA 100% Merino T-Shirt 150g — Red Sienna
  • MEFONNA 100% Merino T-Shirt 150g — Red Sienna
  • MEFONNA 100% Merino T-Shirt 150g — Red Sienna
  • MEFONNA 100% Merino T-Shirt 150g — Red Sienna
  • MEFONNA 100% Merino T-Shirt 150g — Red Sienna
  • MEFONNA 100% Merino T-Shirt 150g — Red Sienna
  • MEFONNA 100% Merino T-Shirt 150g — Red Sienna
Our model is 170 cm tall and wears size XS.
She weighs 50 kg and wears size XS on top and size XS on the bottom.

MEFONNA 100% Merino T-Shirt 150g

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

100 €
100 €
Colour : Red Sienna
Size : XS - EU : 36 / US : 4 Guide
Our model is 170 cm tall and wears size XS.
She weighs 50 kg and wears size XS on top and size XS on the bottom.
In stock. Delivered as early as
Pay in 3 interest-free instalments with Alma
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Fast delivery and easy returns

Made in Europe from 100% natural virgin wool (with no synthetics), the Mefonna provides active temperature regulation and natural odour control, ideal for multi-day adventures. Its ergonomic fit, designed specifically for the female form, features raglan sleeves and flatlock seams to eliminate chafing across the tops of the shoulders under backpack straps. A breathable, temperature-regulating pure wool base layer.

Weight : 133 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, perfect for intensive 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

Exceptional Merino wool, sourced from farms with free-range animals and no mulesing. 100% of processing (combing, carding, spinning, dyeing, weaving...) is done near the Alps. Final assembly takes place 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 great care using technical, mountain-friendly materials, your Mefonna 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.

PRACTICALITY

TECHNICAL MESH

Technical mesh providing stretch and breathability, ensuring comfortable backpack wear.

PRACTICALITY

TECHNICAL MESH

Technical mesh providing stretch and breathability, ensuring comfortable backpack wear.

COMFORT

ODOR CONTROL

Natural properties of high-quality virgin Merino wool, offering UV protection and suited for long outings.

PREMIUM FABRIC

MERINO WOOL

Natural moisture and temperature regulation thanks to ultra-fine Merino wool, forming a high-quality base layer.

PREMIUM FABRIC

MERINO WOOL

Natural moisture and temperature regulation thanks to ultra-fine Merino wool, forming a high-quality base layer.

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Women - Size guide

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These measurements are neither sent nor stored.

Size guideXSSMLXL
EU3638404244
US4681012
Height (cm)162 - 165165 - 168168 - 173173 - 176176 - 179
Chest circumference (cm)86 - 8990 - 9394 - 9798 - 101102 - 105
Waist circumference (cm)62 - 6667 - 7172 - 7677 - 8182 - 86
Hip circumference (cm)88 - 9293 - 9798 - 102103 - 107108 - 112
Schéma de mesure pour femme

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.