BASE LAYER BUYING GUIDE

Merino wool is a standout material for base layers, especially for those spending long days in the mountains. Its fine fibres make it exceptionally soft, allowing for excellent freedom of movement and a comfortable feel against the skin.

One of the biggest advantages of merino wool is its natural antibacterial and antimicrobial properties. Thanks to the lanolin and keratin wax produced by merino sheep, these base layers can be worn for several days without developing odours or needing frequent washing.

Additional benefits of merino wool base layers include:

• Excellent heat retention: Keeps you warm even in cold conditions.
• Breathability: Allows sweat vapour to escape, helping you stay dry during intense activity.
• Odour resistance: Can be worn for multiple days without smelling.
• Softness: Fine fibres prevent itching and irritation, making them comfortable for all-day wear.

Merino wool’s unique combination of warmth, breathability, and odour resistance makes it an ideal choice for anyone looking to stay comfortable and dry while working hard on the mountains.

Synthetic base layers are typically made from polyester or polyester blends. These materials are popular for their technical performance and are especially valued by active mountain-goers.

Synthetic options excel in several key areas:

• Breathability: They allow air to circulate, helping to regulate your body temperature during activity.
• Moisture-wicking: Synthetics efficiently pull sweat away from your skin, keeping you dry even during intense sessions.
• Quick-drying: These fabrics dry much faster than natural fibres, reducing the discomfort of lingering sweat.

However, it’s important to note that synthetic base layers generally aren’t as warm as merino wool. They focus more on moisture management and quick drying than on heat retention.

No matter which material you choose, look for ventilation features in your base layer. Options like a quarter zip or mesh panels under the arms or along the spine can:

• Improve airflow
• Help release excess heat
• Keep your temperature consistent when transitioning between high activity and rest (like waiting for the lift)

Choosing the right synthetic base layer with good ventilation will help you stay comfortable, dry, and ready for anything the mountain throws your way.

A well-fitting base layer is essential for effective temperature regulation and moisture management on the mountain. Your base layer should be close-fitting to trap body heat and wick away sweat efficiently.

Tops

• A base layer top should cover all exposed areas for maximum warmth.
• You should be able to tuck it into your outer layers to prevent cold air from getting in.
• Choose your usual t-shirt size—the fit will be snug by design to optimise performance.

Bottoms

• Like tops, bottom base layers should be close-fitting for better insulation.
• They should reach the bottom of your lower leg and rest comfortably around your ankle.
• Select your usual size for a fit that’s designed to sit next to the skin and keep you warm.

A snug fit in both tops and bottoms ensures your base layer works as intended, keeping you comfortable and dry throughout your day on the slopes. 

Layering is the most effective way to stay warm and comfortable on the slopes. Rather than relying on a single thick jacket, using multiple layers traps air between each layer, providing better insulation and flexibility.

A basic layering system consists of three essential components:

• Base layer: Worn next to your skin, this layer manages moisture by wicking sweat away to keep you dry.
• Mid-layer: Provides insulation by trapping body heat, helping you stay warm in cold conditions.
• Outer layer: Acts as your shield against wind, snow, and rain, keeping the elements out while allowing moisture to escape.

Each layer plays a crucial role, and getting the right combination is just as important as the individual pieces themselves. For more detailed advice, check out our mid-layer buying guide and ski jacket buying guide.