Thermal Clothing: Your Essential First Layer for Sports

The secret to enjoying your favorite outdoor activities during winter is not dressing more, but dressing better. Thermal clothing, also known as a first layer or base layer, is the foundation of proper gear. Its mission is to keep your skin dry and maintain your body heat, guaranteeing constant comfort regardless of cold or exercise intensity.

How Does Thermal Underwear Work?

Unlike conventional cotton t-shirts that absorb and retain sweat cooling the body, thermal clothing performs two vital functions:

• Moisture Wicking: It's made with technical fabrics that don't absorb moisture but transport it from your skin to the outer layers to evaporate. This keeps your skin always dry.
• Thermal Insulation: Its fibers create a thin layer of warm air around your body, acting as a natural insulator that retains your own heat without need for bulky garments.

Choose the Perfect Thermal Clothing for You

Choosing the material is key and depends on the intensity of your activity and your budget. At CaranvaSports, you'll find the two best options on the market so you can build your ideal gear.

Our Collections:

• Thermal Shirts: Available in long sleeve, short sleeve and zip-neck for extra ventilation. They're the essential garment to protect your core, which is where the most heat is lost.
• Thermal Tights: Protect your legs from the cold with full-length tights or capri format. They're perfect to wear under your ski, trekking or cycling pants.

Material Type	Ideal For	Main Advantages	To Consider
Synthetic Fibers (Polyester, Polypropylene)	High-intensity activities like skiing, running or cycling.	Very breathable, ultra-fast drying, durable and more economical.	Can retain odors more easily after intense use.
Merino Wool	Activities of variable intensity, long days or very cold climates.	Excellent thermal regulation (warm even when wet), naturally antibacterial (no odor), very soft to the touch.	Slower drying time and higher price than synthetic fibers.

Frequently Asked Questions About Thermal Clothing

Does Thermal Clothing Have to Be Very Tight?

Yes, thermal clothing should fit snugly against your body, like a second skin, but without squeezing or limiting movement. This fit is crucial for it to efficiently wick sweat and create the air layer that keeps you warm.

What Sports Is Thermal Clothing Recommended For?

It's an essential garment for any activity in cold climates. It's necessary for sports like skiing and snowboarding, but also highly recommended for mountaineering, trekking, winter running, cycling or even working outdoors in winter.

How Should I Wash My Thermal Clothing to Keep It Working?

Wash it in the washing machine with a synthetic or delicate cycle, always in cold water (maximum 30°C). Use neutral detergent and avoid fabric softener, as this product saturates the fibers and drastically reduces their breathability. Always air dry.

Can I Use a Cotton Shirt as a First Layer?

Not recommended. Cotton is a fabric that absorbs and retains moisture. Once you sweat, the shirt will soak up, cool down quickly and cause you to lose body heat, increasing the risk of hypothermia. Always use technical synthetic or merino wool garments.