9.3 average score from 28 reviews


Model number: BUW-20
  • Technical long sleeve base layer with FarInfraRed (FIR) technology for cold weather conditions
  • Far InfraRed technology keeps your body warm and exceptionally comfortable by improving body’s metabolism and microcirculation
  • The innovative seamless body construction incorporates rib zones for enhanced body support and increased thermal efficiency
  • 3D mesh zones provides improved perspiration control
More information

FIRLayer Undershirt

FAR Infrared technology makes this base layer the best protection in the worst conditions. Due to the microscopic ceramic particles in the fabric, infrared heat from the body is reflected back on the skin for an extra dimension in insulation. Long sleeves, warm but thin material and a high collar; all features to make this a great choice for when it gets rough outside. Besides protection, the special ribs in the material give your body the support it needs.

FIRLayer FIRLayer
FIRLayer FIRLayer
FIRLayer FIRLayer
FIRLayer FIRLayer
FIRLayer FIRLayer


  • Sizes XS/S,M/L,XL/XXL


  • Collection Performance
  • Gender Unisex
  • Sleeve length Long sleeves
  • Temperature - 0 °C, 0 - 5 °C, 5 - 10 °C
  • Wash (degrees) 30
  • Bleaching No
  • Composition 65% polyester, 27% polyamide, 8% elasthane
  • Dry clean No
  • Ironing No
  • Materials Far Infrared
  • Thermo Yes


Unisex design.

Far Infrared (FIR) Technology

Far Infrared (FIR) Technology

Where normal insulation works through little air bubbles, works Far InfraRed through a whole other concept. The body emits infrared energy in the form of heat that goes straight through normal insulation. Special ceramic microparticles in the fabric of products with the Far InfraRed technology, work like a shield to bounce this energy back to the skin. The second level of insulation that is not affected by moist. Keeping your body warm and comfortable without thick layers of clothing.