When choosing a base layer, the main difference between synthetic fabrics and merino wool comes down to performance, feel, and how you plan to use them. Both are excellent options—it just depends on your needs.
Synthetic base layers (usually made from polyester or nylon blends) are lightweight, durable, and dry very quickly. They’re great for high-intensity activities because they wick moisture away from the skin efficiently and hold up well to frequent washing. They’re often more budget-friendly too. However, they can retain odour more easily over time, especially on multi-day trips.
Merino wool base layers, on the other hand, are made from fine natural wool fibres. They’re incredibly soft, breathable, and excellent at regulating body temperature—keeping you warm in cold conditions and cool when it’s milder. One of merino’s biggest advantages is its natural odour resistance, making it ideal for longer adventures. While it can take a little longer to dry than synthetics and is often more expensive, many people love it for its comfort and versatility.
In short, if you’re looking for quick-drying durability for high-output activities, synthetic is a great choice. If comfort, temperature regulation, and odour control are your priorities—especially for multi-day wear—merino is hard to beat.
The Dart Long Sleeve T-Shirt from Montane is a classic, all-season, all-mountain technical baselayer. The 100% recycled APEX ECO fabric perfectly balances warmth, wicking and breathability and is finished with POLYGIENE permanent odour control for multi-day freshness.
The Montane Men’s Dart XT Zip Neck Base Layer is the ultimate high-alpine or expedition base layer. Recycled Apex Thermo fabric with a brushed back offers long-term comfort and high wicking ability – moving any moisture that’s generated away from the body. 4-way stretch also allows for unrestricted dynamic movement, without compromising thermal efficiency. Polygiene treatment also provides essential odour control – perfect for multi day use during high output activities. Whether ski touring, mountaineering, or taking on an expedition in sub-zero environments, enhance your winter layering system with this warm base layer, part of their best selling Dart base layer range
RAB Force long sleeve tee. Ideal for covering up and keeping cool in hot, sunny weather, this breathable long-sleeved tee is made with UV-protective Dryflo™ Solar fabric to shield you from harmful rays. With a wearable, casual fit, it’s a versatile tee for active mountain use.
Merino is not just when the temperatures are cooler! This Merino long sleeve is designed to keep you warm in winter, but also helps your body regulate its temperature when your pushing yourself to the limits.
