Base layers

A set of thermal underwear will help you maintain your body temperature in all conditions. That means it will keep you warm in winter and cool you down in summer or during strenuous activities. 

You can choose between two materials, or a mix of both, depending on your activity and the features you are looking for:

• Merino wool: natural, antibacterial, temperature-regulating, and it insulates even when wet.
• Polyester/polyamide/elastane: synthetic, moisture-wicking, and ideal for heavy physical activity. 

Thermal underwear is made to retain the body heat you generate and quickly wick away your sweat. The thicker your thermal clothing, the more air it holds and the warmer you’ll be. If your thermal clothing is thinner and tighter, your sweat will be wicked away faster.

It is therefore important to find thermal clothing that suits your activity. Don’t go running in a thick thermal shirt that is extremely insulating and don’t go on a winter sports holiday with a thin thermal shirt that only wicks away sweat. 

Want to enjoy your favourite base layer for a long time? Then be sure to maintain it well on a regular basis. The most important thing to consider is the material.

Merino wool

If you have a merino wool base layer, then your washing machine won’t have much work to do. This type of wool is naturally antibacterial, so unpleasant odours don’t stand a chance. However, it is important to let it air out properly on a regular basis. And if it really is time for a wash, wash it at a low temperature with a special wool detergent.

Synthetic

Ideal for more strenuous activities, as it wicks away sweat at lightning speed and dries quickly. The downside: sweat odours tend to stick more to synthetic clothes. It is best to throw your base layer in the washing machine after each activity to prevent the salt in your sweat from harming the fabric. Use a special detergent and conditioner, such as the Nikwax Basewash.