FRAM Base Layers — Warmth, Moisture Management, and Comfort for Every Adventure

A base layer is the foundation of every effective layering system. Rather than simply keeping you warm, it regulates body temperature, wicks moisture away from your skin, and helps you stay dry and comfortable during physical activity. That's why base layers for hiking, climbing, running, skiing, and winter adventures are an essential part of any outdoor clothing system.

FRAM designs base layers made in Ukraine, developed for hiking, mountaineering, expeditions, endurance sports, and everyday use in cold weather. Built with high-performance materials and tested in real outdoor conditions, they provide reliable comfort wherever your journey takes you.

What Is a Base Layer and How Does It Work?

If you've ever wondered what a base layer is, the answer is simple: it is the first layer worn directly against your skin. Its primary purpose is to move moisture away from your body while helping maintain a stable body temperature.

Unlike ordinary clothing, a technical base layer prevents sweat from accumulating on your skin, reducing the risk of chilling during breaks or changing weather conditions. This makes it an essential choice for hiking, climbing, trail running, skiing, and other cold-weather activities.

How to Choose the Right Base Layer

When deciding how to choose a base layer, the most important factors are fabric performance, breathability, moisture management, and the type of activity you plan to do.

FRAM base layers are made using advanced Prolen®-Siltex and CoolMAX® fabrics, both trusted by outdoor professionals for their outstanding comfort and technical performance.

Prolen®-Siltex is an ultra-light polypropylene fiber with antibacterial properties. It absorbs almost no moisture, dries exceptionally fast, efficiently transports sweat away from the skin, and helps maintain long-lasting freshness during multi-day expeditions.

CoolMAX® is a high-performance polyester fiber engineered with a specialized channel structure that rapidly moves moisture away from the body while maximizing airflow. It delivers excellent breathability and comfort during high-intensity activities, making it ideal for everything from summer trekking to year-round outdoor adventures.

How to Wear Base Layers

Many people ask how to wear base layers correctly. The answer is simple: they should always be worn directly against the skin as the first layer of your clothing system.

For the best performance, pair your base layer with an insulating mid-layer, such as fleece, followed by a weather-protective shell when necessary. This layering system allows your clothing to efficiently regulate temperature, manage moisture, and keep you comfortable in changing weather conditions.

Women's and Men's Base Layers

The FRAM collection includes both women's base layers and men's base layers, designed with anatomical fits for maximum comfort and unrestricted movement. Stretch fabrics provide a close, ergonomic fit without limiting mobility, making them comfortable for extended wear.

Selected models also feature a supportive athletic fit, making them suitable as compression base layers for trail running, climbing, endurance training, and other high-intensity outdoor activities where muscle support and efficient moisture management are especially important.

Base Layers for Running, Hiking, and Winter Adventures

FRAM base layers perform equally well as base layers for running, base layers for hiking, trekking, skiing, mountaineering, and winter expeditions. Their advanced moisture management and thermal regulation help maintain comfort across a wide range of temperatures and activity levels.

If you're looking for winter base layers, choosing the right first layer is one of the most important decisions for staying warm, dry, and comfortable throughout your adventure.

Why Choose FRAM Base Layers?

FRAM creates base layers from the manufacturer, developed using practical experience gained through hiking, mountaineering, and expedition travel. Every garment combines premium materials, ergonomic design, and field-tested performance to meet the demands of serious outdoor enthusiasts.

By choosing FRAM base layers, you get a dependable first layer built with Prolen®-Siltex and CoolMAX® technologies—designed to keep you warm, dry, and comfortable whether you're heading out for a morning run or climbing the world's highest peaks.