Women's Extreme X Active Base Layer - Moisture-Wicking Thermal Underwear for Running, Hiking & Cold Weather Workouts

Voted ''Best Synthetic Baselayer'  by Runner's World Magazine.

A proven favorite among endurance athletes, this long-sleeve baselayer jersey is designed for racing and high-intensity workouts in mild to cold winter conditions. It combines lightweight SEAQUAL™ polyester, Coolmax® Air Technology and recycled polyester to provide exceptional body-temperature management during high-intensity activities.

• Waffle-knitted design for enhanced moisture transport and comfort
• Polyester fibers with a unique propeller-shaped cross-section
• Great stretch and ergonomic fit to ensure optimal freedom of movement
• Mesh inserts at armpits for enhanced ventilation
• Flatlock seams that follow body movements
• Slim fit
• SEAQUAL polyester produced from recycled fishing nets
• Rated for temperatures from -5ºC to +10ºC, 23°F to 50°F


SIZE: XS-XXL
FABRIC: 40% Polyester SeaQual 39% Polyester "Coolmax" 21% Polyester-recycled