When it comes to outdoor adventures, staying comfortable in all weather conditions starts with what you wear next to your skin. Merino base layers are a game-changer for hikers, trekkers, and outdoor enthusiasts. They provide natural temperature regulation, moisture management, and odour resistance, making them a must-have in any layering system. Whether you’re hitting the trails, cycling, or camping, base layers merino wool deliver reliable performance across seasons.

How merino base layers enhance comfort and performance outdoors

1. Layering strategies with merino base layers

The key to all-weather performance is understanding how to layer. Start with merino base layers next to your skin. The Fjallraven Abisko Wool Long Sleeve Top and Wilderness Wear Men’s Merino Mid 190 Long Sleeve Crew Top are excellent for regulating heat while keeping you dry.

For lower-body coverage, the Wilderness Wear Merino Fusion 220 Men’s Leggings/Thermals offer lightweight warmth under trekking pants or shorts, making them perfect for extended hikes or for cycling base layers.

When planning multi-day trips, incorporating merino base layers into your pack ensures flexibility. They can be worn alone on warmer days or layered under mid-layers during colder conditions. For inspiration, check out our ideas for multi-day mountain hikes to see how to maximise versatility without adding unnecessary weight.

2. Mid layers & fleece

Once your base layer is in place, adding a mid-layer provides extra insulation and heat retention. The Fjallraven Varmland Fleece Jacket M-1 is a durable option that traps warmth without restricting movement, ideal for active pursuits in cool weather.

For more technical applications, the Mont Supernova Polartec 300 Fleece Men’s Jacket offers lightweight, breathable warmth and works perfectly over merino tops during long hikes or casual outdoor activities.

Combining mid-layers with merino wool base layers creates a system that adapts to changing conditions. For example, pair a merino base layer with fleece and then add a waterproof shell if rain or wind becomes a factor. For tips on complementing your layers with lower-body gear, explore what’s in my pack? My favorite hiking & camping gear for multi-day trips.

3. Insulation layers & puffer jackets

For extremely cold conditions, adding an insulated layer is crucial. The Mac in Sac Polar Men’s Reversible Down Jacket provides lightweight, compressible warmth for alpine conditions or winter hikes. 

Similarly, the Mont Guide Hoodie G-Loft Insulated Men’s Jacket offers a versatile insulated option that layers seamlessly over merino and fleece for maximum comfort. Insulated layers are ideal for early mornings, high-altitude treks, or extended stops where body heat can quickly drop. Pairing them with merino base layers ensures you retain core warmth while remaining active. Check out Dave’s 5 winter outdoor faves: What you need on your next hike and why! for practical layering ideas in cold-weather scenarios.

Want to know what Dave takes on his multi-day hikes? Here's a rundown in our video:

4. Rainwear & shell layers

No outdoor adventure is complete without protection from the elements. Waterproof shells like the Mont Mountain Pro Shell Men’s Jacket or the Outdoor Research Foray 3L Rain Jacket shield you from wind and rain while remaining breathable. When layered over merino wool base layers and fleece, these jackets create a fully adaptable system for all-weather protection.

Rain jackets are essential for mountain treks, coastal hikes, or unexpected weather changes. They pair perfectly with insulated or fleece layers, giving you the freedom to adjust your clothing for comfort and performance. For men’s trekking gear suggestions, see from trail to camp: why men’s trekking pants are worth the investment, and for women, refer to adventure-tested: our favourite women’s hiking boots in 2025 to complete your all-weather setup.

Looking for hiking boots to complete your adventure gear setup for your next trip? Dave runs through all your options in this video:

Our favorite Rain Jackets for Men & Women

The Mac in a Sac Origin 2 Packable Jacket is an ultra‑lightweight, highly packable rain shell that’s perfect for outdoor layering systems. Designed to go over your base layers and mid‑layers without adding bulk, this waterproof jacket features fully taped seams, a water‑repellent YKK zip, adjustable hood and breathable fabric that helps regulate temperature during activity—ideal for unpredictable weather on the trail. 

Its compact design makes it easy to stow in your pack when not in use, giving you reliable wet‑weather protection whether you’re out for a day hike or a multi‑day adventure.



Have you seen our FREE HIKING & CAMPING CHECKLIST? Download now and cover all your hiking & camping needs for single and multi-day hiking and camping.



Layering is the foundation of comfort, protection, and performance when hiking or travelling. Starting with layering strategies with merino base layers, you establish a breathable, moisture-wicking foundation that regulates body temperature and keeps you comfortable across all conditions. Adding mid layers & fleece provides essential insulation, allowing you to retain warmth without restricting movement, while insulation layers & puffer jackets offer extra protection during cold mornings, high-altitude treks, or winter adventures.

Finally, rainwear & shell layers like waterproof and packable jackets shield you from wind, rain, and unpredictable weather, completing a versatile system that can adapt to changing conditions.

Heading out on a multi-day hike soon? Here's a video made by our Store Manager Kris! 

By thoughtfully combining these layers, you create a dynamic outdoor wardrobe that keeps you dry, warm, and comfortable while protecting your body from extremes. Whether you’re cycling, trekking, or exploring multi-day trails, a proper layering system reduces fatigue, prevents overheating or chill, and gives you the freedom to enjoy every moment of your adventure. Investing in high-quality, durable layers ensures that you’re prepared for anything, making your hiking or travelling experiences safer, more enjoyable, and stress-free.

Looking for Trekking Pants to pair with the top of body options listed above? Here's a video from our founder Dave talking through our best Hiking & Trekking pant options.

Why shop at PAST Outdoors

At PAST Outdoors, we’ve spent years equipping adventurers across Australia and New Zealand with high-performance, field-tested outdoor gear. Our collection of merino base layers, mid-layers, insulation, and waterproof shells is designed to perform in real-world conditions.

Thousands of satisfied customers trust PAST Outdoors to provide durable, versatile, and high-quality clothing that keeps them safe, comfortable, and ready for adventure. Equip yourself with the right layers for your next hike, trek, or cycling expedition and experience the confidence that comes from wearing expertly tested gear.