Thermals, also known as base layers, help regulate body temperature and wick moisture away from the skin. The best thermals for skiing and snowboarding depend on material, weight, and breathability.

Types of Thermals


1. Synthetic Thermals (Polyester/Spandex Blends)

• Lightweight, moisture-wicking, and quick-drying
• Great for high-intensity activities like skiing and snowboarding
• Affordable and durable, but can retain odors


2. Merino Wool Thermals

• Naturally warm, breathable, and moisture-wicking
• Excellent temperature regulation in both cold and warm conditions
• Soft, odor-resistant which is beneficial on trips as you don't need to wash them as often.

Thermals should fit snugly against the skin without being too tight or restrictive. A proper fit ensures they can effectively trap body heat and wick away moisture while allowing freedom of movement.

Key Fit Considerations

• Snug but not restrictive: Thermals should hug the body without feeling too tight or uncomfortable
• No excess fabric: Loose or baggy thermals won’t insulate as well and can bunch under outer layers
• Full range of motion: A good fit allows you to move freely for activities like skiing and snowboarding
• Layering compatibility: Thermals should fit comfortably under mid-layers and outerwear without causing bulk

Merino base layers come in different weights, which refer to the fabric's grams per square meter (GSM). The weight determines warmth, breathability, and best use conditions.

Merino Base Layer Weights & Uses

Lightweight (150-200 GSM)

• Best for mild to cool conditions or high-intensity activities
• Moisture-wicking and breathable, ideal for skiing, snowboarding, and layering
• Works as a year-round base layer


Midweight (200-250 GSM)
 
• Suitable for cold conditions with a balance of warmth and breathability
• Great for all-day skiing, snowboarding, and winter sports
• Can be worn alone in cool weather or layered for extra insulation


Heavyweight (250+ GSM)

• Best for freezing temperatures or low-activity days in extreme cold
• Provides maximum insulation while still wicking moisture
• Ideal for resort skiing, mountaineering, and extended time in the snow

Layering properly is key to staying warm, dry, and comfortable on the slopes. A good layering system consists of three main layers: base layer, mid-layer, and outer layer.


1. Base Layer (Moisture Management)

• Worn next to the skin to wick sweat away and keep you dry
• Merino wool is the best option for warmth and breathability
• Avoid cotton, as it absorbs moisture and stays wet


2. Mid-Layer (Insulation)

• Traps body heat to keep you warm
• Common options include fleece, down, or synthetic insulated jackets
• Can be adjusted depending on temperature and activity level.


3. Outer Layer (Weather Protection)

• Shields against wind, snow, and moisture
• Choose a waterproof and breathable ski jacket and pants (Gore-Tex or high waterproof rating)
• Shell jackets offer versatility, while insulated jackets provide extra warmth


Additional Layering Tips

• Wear thermal socks, waterproof gloves, and a neck gaiter for added warmth
• Adjust layers based on weather conditions and activity level

For expert layering advice and high-quality gear, visit Welcome Board.