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A few left in stock!
- Delivery time workdays.
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Orders placed before 14:00 are shipped the same day.
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Mons Royale Women's Sierra Sports Bra - Merino wool
A sports bra that can keep up, no matter how hard you work. With a sporty slim cut and breathable merino mesh racer back, this medium support bra is ready for action and adventure day in day out.
Mons’ high performance merino underwear provides athletic support and natural temperature regulation with bold, contemporary style. 140 Merino Air-ConTM is ultra-lite and ultra breathable for year round us
Materials
Air-Con, 83% merino wool, 13% nylon, 4% elastaneFeatures
- Ultra-Lite 140 Merino Air-Con fabric is fast wicking and naturally odor-resistant
- Low profile racerback shaping
- Medium support
- Three-layer merino front with removable padding
- Breathable merino mesh back
- Slim-line binding for close comfort that doesn't cut in
- Weight: 140 gsm
Size
Mons Slim Fit
What's sustainable?
- ZQ Certificate Non-mulesing Merino wool
- ZQ is a hallmark that certifies a farmer is meeting the highest standards in the areas of animal welfare, environmental care, and social sustainability - e.g. traceable, No mulesing, Hand selected
- Environmentally friendly dyes and water processing & fair manufacturing process - read more
Weekendbee guarantee
When you purchase a product from Weekendbee, you can be sure the choice is better for our planet. We support sustainably produced high quality products so that you can buy less and better.
ZQ Certificate
Non-mulesing Merino wool
Environmentally friendly dyes and water processing
Sierra Sports Bra - Merino wool
Size chart
| XS (CM) | S (CM) | M (CM) | L (CM) | XL (CM) | |
| BUST | 79-84 | 84-89 | 89-94 | 94-99 | 100-107 |
| WAIST | 63-68 | 69-74 | 74-79 | 80-85 | 85-92 |
| HIP | 87-92 | 93-96 | 97-102 | 103-107 | 108-116 |
All measurements are based on body measurements. Between sizes and not sure what to do? That's up to you - do you like a tight fit? Size down. Into something with a bit more room? Size up.
Still thinking what's the right size for you? Let us help!

- Chest/Bust: Measure around the widest part of your chest/bust
- Waist: Measure natural smallest point around your middle. Often this is where you bend when touching your toes.
- Hips: Stand straight and measure around the largest part of your hips.
- Inseam: Measure inside seam from crotch to bottom hem.
Free delivery in EU for all orders over 129€
Finland shipping Matkahuolto / PostNord
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Delivery2–3 business days to pickup points or home.
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PriceFREE ≥ 129 € / Orders < 129 € → 4,90 €
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CarriersMatkahuolto and PostNord pickup points, home delivery available.
Other countries & regions UPS & GLS
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EUFREE ≥ 129 € (exceptions: remote areas / large items). Orders < 129 € → 8,90 €
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Norway30 €
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UK30 €
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US / CA / MX / JP / AU / NZ / KR / SG / HK SAR / CH / IS / LI / MC / AD / SM / VA50 €
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Others100 € — final cost confirmed at checkout after choosing payment & delivery method
14-day return policy Easy returns
You can return or exchange your order within 14 days of receiving it. Notify us within 14 days from delivery; after notification, ship the return within the next 14 days.
-
FinlandFREE returns
-
EU (other)8,90 € per return (deducted from refund). Direct exchanges are free.
-
Outside EUYou cover return shipping fee + 30 € handling
We care about the environmental impact of logistics and aim to avoid unnecessary returns. We’re happy to help you choose the right product before ordering.
Free returns
Finland shipping Matkahuolto / PostNord
-
Delivery2–3 business days to pickup points or home.
-
PriceFREE ≥ 129 € / Orders < 129 € → 4,90 €
-
CarriersMatkahuolto and PostNord pickup points, home delivery available.
Other countries & regions UPS & GLS
-
EUFREE ≥ 129 € (exceptions: remote areas / large items). Orders < 129 € → 8,90 €
-
Norway30 €
-
UK30 €
-
US / CA / MX / JP / AU / NZ / KR / SG / HK SAR / CH / IS / LI / MC / AD / SM / VA50 €
-
Others100 € — final cost confirmed at checkout after choosing payment & delivery method
14-day return policy Easy returns
You can return or exchange your order within 14 days of receiving it. Notify us within 14 days from delivery; after notification, ship the return within the next 14 days.
-
FinlandFREE returns
-
EU (other)8,90 € per return (deducted from refund). Direct exchanges are free.
-
Outside EUYou cover return shipping fee + 30 € handling
We care about the environmental impact of logistics and aim to avoid unnecessary returns. We’re happy to help you choose the right product before ordering.
Mons Royale sustainability

"Bold, bright and ultra-technical merino apparel."
Originally from Lake Wanaka New Zealand, Mons Royale creates high-performance technical merino apparel that keeps you looking and feeling good, on snow or dirt, all year round. Using merino wool to create beautiful underwear, base layer, and mid-layer, Mons Royale outperforms the man-made competition every time.
Read more about Mons Royale's sustainable manufacturing process.
Ethically grown, natural, biodegradable and sustainable, merino is soft, ultra-breathable, regulates your temperature in winter and summer, dries quickly and doesn’t stink. Mons Royale uses ZQ Merino to guarantee the world’s highest standard in fiber quality, animal welfare, and environmental management.
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Ihanan pehmeä päällä kokokin täysin sopiva. Jos ei tykkää ohuista toppauksista, ne saa halutessaan pois. Villa materiaalina kestää käyttöä ja näitä ei tarvitse pestä ihan joka käytön jälkeen., tuuletus riittää.
Sierra Sports Bra - Merino wool
Mycket bekväm , ger bra stöd.
Aikaisemmassa Mons Royale mallissa rinnan alla oleva kaistale oli leveämpi, minkä ansiosta liivit olivat napakat ja pysyivät hyvin päällä. Tässä mallissa leveä nauha on korvattu kapealla kuminauhamaisella kaistaleella, joka ei pidä liivejä kunnolla paikallaan.
Cómodo y muy bonito. Me encanta el tejido que evita la aparición de malos olores al hacer ejercicios de cardio. No más tops de poliéster apestosos.
Comfortable and very nice. I love the fabric that prevents the appearance of bad odors when doing cardio exercises. No more stinky polyester tops.
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