La Sportiva Synth Light Long Sleeve Men's

• Knit patterns change across the body for warmth where you need it and airflow where you do not
• Close fit moves with you without riding up
• Breathable enough that you will not overheat on climbs
• Polygiene treatment helps keep odour down
• Light enough to pack away if the day warms up

• Type: Men's long sleeve base layer
• Fit: Anatomical
• Weight: 172g
• Fabric: 90% recycled polyamide, 7% polypropylene, 3% elastane
• Technology: Knit_Tech with variable density structures
• Treatment: Polygiene anti-bacterial and anti-odour
• Layer: L1 base layer

• Winter runs and cold early starts
• Layering under a jacket or vest
• Ski touring and other winter aerobic activity

Less suited to: Mild days where a short sleeve is plenty. For that, look at Men's Tops.

A good base layer is the one you reach for all winter. The Synth Light uses mapped knit zones rather than one flat fabric, so you get warmth and airflow in sensible places. It gives our men's range a close-fitting cold weather layer that works under almost anything.