No. High-quality merino wool is not itchy. Estroni uses fine merino fibres at 18.5 microns designed to bend gently against the skin rather than prickle it. This reduces irritation and makes it suitable for sensitive skin, including for people who’ve found traditional wool uncomfortable in the past.

No — this is a common misconception. Merino wool is naturally temperature-regulating, meaning it helps keep you cool in warm conditions and warm when it’s cooler. It does this by absorbing moisture vapour and releasing it, rather than trapping heat and sweat against your skin. When it is warm, the fibers also loosen up to release heat and when it’s cold, the fibers constrict to  maintain it.

Merino activewear feels soft, smooth, and breathable on the skin. Unlike synthetic fabrics that can feel slick or clammy, merino has a dry, natural hand-feel that stays comfortable even when you move or sweat.

Merino wool is a premium natural fibre that costs significantly more to source and produce than polyester, which is plastic-based.
You’re paying for:

• Renewable, breathable fibre
• Natural odour resistance
• Temperature regulation
• Greater comfort and longevity
• Fewer chemical treatments

In short, it’s designed to perform better and feel better — not just look good on a hanger.

Merino wool is naturally breathable, odour-resistant and temperature-regulating, which means it doesn’t rely on heavy chemical finishes to perform.

Compared to synthetic activewear, it reduces prolonged skin contact with plastic fibres and added treatments, making it a preferred choice for people seeking lower-tox, skin-friendly materials. Our products meet OEKO TEX standards meaning there are no harsh chemicals or dyes used.

Yes - our merino wool is superwash treated to allow for easier care and improved durability.

This treatment helps prevent shrinkage and makes the garment suitable for regular wear and washing, while still maintaining the natural benefits of merino wool. There are different methods of superwashing. We use an OEKO TEX certified manufacturer so you can be rest assured there’s no harsh chemicals used in the process.

Less often than synthetic activewear. Merino naturally inhibits odour-causing bacteria, so garments stay fresher between wears. Many customers find they can air their pieces between uses and wash only when needed.

• Cold machine wash on a gentle cycle
• Use mild detergent
• Avoid fabric softener and bleach
• Lay flat or line dry in shade

With proper care, merino activewear maintains its shape, softness, and performance over time.

All natural fibres can pill slightly with friction, especially in high-movement areas. However, high-quality merino fibres are long and strong, which helps minimise pilling. Proper washing and avoiding abrasive surfaces will further reduce it.

Estroni merino shorts are designed for coverage, but like all natural fibres, merino behaves differently to synthetic fabrics when stretched.

When squatting or in deep stretches, the fabric may become slightly sheer (around 10%), particularly if worn with dark or seamed underwear. This is due to the natural structure of merino wool and how it opens under tension — unlike polyester, which relies on heavy compression and coatings.

For best coverage, we recommend:

• Nude or seam-free underwear
  
  
• Choosing the correct size
  
  
• Avoiding darker underlayers
  
  

This allows you to enjoy the breathability and skin-friendly benefits of merino, while feeling comfortable and supported during movement.

Our sizing is true to size, with a slightly more relaxed fit. If you’re between sizes, we recommend sizing down for the best fit.

If you’re unsure, you’re welcome to order both sizes and return the one that doesn’t feel right — return postage is on us. We want you to feel confident and comfortable in your choice.

Yes. Our merino wool is sourced from suppliers certified under the Responsible Wool Standard (RWS).
RWS ensures animal welfare, responsible land management, and traceability through the supply chain — including strict requirements around sheep handling and the prohibition of practices such as mulesing.

This certification allows us to source merino with confidence, while supporting ethical farming practices and environmental care.