Hot Chillys Thermal Base Layers & Underwear

Hot Chillys

Hot Chillys has perfected the formula for base layer comfort through thoughtful fabric innovation and decades of cold-weather expertise. Their thermal underwear and base layers use merino wool, synthetic blends, and hybrid constructions that wick moisture, regulate temperature, and stay comfortable all day long. The company offers different weight options — lightweight for active days, midweight for variable conditions, and heavyweight for serious cold. At Willis, we've seen countless customers discover how the right base layer transforms their mountain experience completely. Hot Chillys' attention to fit and seaming means you'll forget you're wearing them, and the fabrics hold up through season after season of use. They offer options for men, women, and kids, so families can all stay warm together. The odor-resistant properties of their merino blends mean you can wear them longer between washes, reducing environmental impact. Come by our shop and feel the difference premium base layer quality makes.