Women's ODLO Blackcomb Warm Performance Long Sleeve Half Zip Base Layer. The Women's Blackcomb Warm Long Sleeve Half Zip is spectacularly efficient at thermal regulation providing insulating warmth when needed and dissipating excess heat when you are highly active. Supremely comfortable as a result of its laser cut fabrication and seam free body design. A Fitted base layer with seamless knit technology using recycled synthetic fibres for a quality, ethical result with integrated engineered Functional Zones™ as seen from the various fabric finishes within the garment that give the Blackcomb™ range their striking design, for optimal moisture management and superb ventilation and total breathability.