4000 Thermal Zip Top Base Layer

• Half-zip mock neck allows adjustable ventilation and easy layering
• Thumbhole cuffs keep sleeves securely in place and add warmth
• Brushed thermal fabric retains body heat in cold conditions
• Flatlock construction minimizes chafing for next-to-skin comfort

Protection / Visibility:

• Brushed thermal fabric for heat retention

Comfort / Construction:

• Soft brushed interior provides exceptional warmth and comfort
• Flatlock seams reduce friction during active movement
• Athletic fit layers comfortably under jackets and outerwear

• Brushed fleece finish inside and out

Material / Fabric:

• Drytex® 4000

Air / Cooling:

• Moisture-wicking fabric keeps skin dry during activity
• Half-zip opening provides adjustable airflow and temperature regulation
• Breathable thermal construction balances warmth and ventilation

Performance:

• Designed for winter running, hiking, cross-country skiing, cycling and outdoor training
• Thermal fabric provides lightweight insulation for cold-weather activities
• Excellent as a standalone top or insulating base layer
• Stretch construction allows unrestricted movement

Care:

• How to take care of your product.

Technology:

• Drytex® moisture management technology

Pockets / Access:

Chamois:

Inseam:

Dimension:

SPD:

Activity:

• Nordic Ski
• Snowshoeing
• Fat Bike
• Running
• Speed Skating
• Commuting

Ideal Conditions:

• Cold to very cold