Seirus Introduces Heatwave Base Layer Lite

The success of Seirus’ HeatWave Base Layers has led to demand for a four-season option providing silky soft comfort and thermoregulation for any activity. Leveraging more than 30 years of innovation and forward-thinking design, the new Heat Wave Base Layer LITE offers a breathable, wafer thin combination of Seirus’ proprietary HeatWave fabric with added wicking and ventilating fabrics for all-day, everyday comfort and quality. 

Making comfort and protection a staple of their designs since 1984, Seirus’ HeatWave LITE base layers offer supreme versatility for staying active in a wide variety of temps and conditions. 

Seirus HeatWave technology is a dual-stage heating system that combines reflective technology with kinetic properties to amplify your body heat and reflect it back to you. By itself, the uniquely engineered Thermal Reflective Layer amplifies 20 percent more warmth inside than traditional linings. Additionally, a kinetic process uses the wicking energy to generate a 4-5 degree increase in warmth, keeping you drier, and making for an incredibly thin and versatile, actively performing fabric.

“Adding HeatWave technology to a super lightweight, silky fabric creates a super thin, wear-anytime layer perfect for chilly mornings and evenings, or as an additional low volume layer in the coldest months,” said Danica Carey, Director of Marketing at Seirus. “We’re all about solving problems, and with the range of temperatures one can experience through the course of a day, we are making sure there’s an option for everyone. The HeatWave LITE Base Layer performs across multiple activities and applications.” 

Reversible for more than twice the versatility, HeatWave™ LITE Base Layers keep you dry, comfortable and at just the right temperature. Lightweight four-way stretch HeatWave fabric provides silky soft comfort and warmth, and breathability and moisture wicking keeps skin dry and healthy. It is available in women’s and men’s tops and bottoms and will be at retailers in November. 

HeatWave LITE Base Layers

Silky soft and reversible for ultimate utility and lightweight warmth
Men’s and Women’s Crew Neck Reversible Top MSRP $74.99
Men’s and Women’s Reversible Bottoms MSRP $69.99


  • Classic Fit
  • Reversible with reflective hits at chest and legs
  • Lightweight Heatwave fabric for all-season warmth and rapid wicking
  • Fabric is breathable 4-way stretch with moisture control
  • Anti-Chafing Flatlock Seam Construction
  • Tops have Raglan sleeves for comfort during intense activities
  • Bottoms have a terry backed elastic waistband for comfort


  • 4-Way Stretch HeatWave with integrated spandex for improved stretch & shape retention
  • Moisture Control/Breathable HeatWave to stay dry and comfortable

Colors: Carbon


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