Men's Thermoactive Sweatshirt Alpinus Active Base Layer Gray GT43860 Size S

Engineered with advanced moisture-wicking fibers, this men's thermoactive sweatshirt pulls sweat away from your skin to keep you dry during high-output activities in cold conditions. The Alpinus Active Base Layer in gray is a technical first layer built for winter sports and outdoor training, combining breathable insulation with a slim, athletic cut that moves with you.

Overview

Part of the Active Base Layer collection, this long-sleeve top is designed for men who demand performance from their base layer. The synthetic blend fabric offers four-way stretch and quick-drying properties, while flat seams and an anti-chafing design ensure comfort under a pack or mid-layer. A round neck and athletic fit make it ideal for layering under a shell or wearing alone during shoulder-season workouts.

What stands out

• Thermal insulation technology traps body heat without adding bulk, keeping you warm in freezing temperatures.
• Breathable fabric allows excess heat and vapor to escape, preventing overheating during intense efforts.
• Odor control properties inhibit bacterial growth, so the top stays fresh even after multiple uses.
• Flatlock seams reduce friction and irritation, making it perfect for all-day wear.
• Quick-drying material means you can wash it at night and wear it again in the morning.

Technical details

• Material: Synthetic blend (polyester/elastane) for stretch and durability.
• Sleeve length: Long sleeve for full coverage and warmth.
• Neckline: Round neck for easy layering.
• Fit: Athletic / slim fit to hug the body without restriction.
• Season: Cold weather and all-season use, ideal for winter layering.
• Intended use: Outdoor sports, winter activities, and as a base layer.
• Color: Gray (neutral tone that pairs with any outerwear).
• Size: S (refer to size chart for exact measurements).
• Technology: Moisture-wicking, breathable, quick-drying, thermal insulation.
• Features: Flat seams, anti-chafing design, odor control.

Our verdict

A versatile and technical base layer that excels in cold-weather performance. The combination of moisture management, thermal insulation, and a comfortable athletic fit makes it a reliable choice for skiers, hikers, and winter runners. The gray color is understated yet practical, and the flat seams are a thoughtful touch for long days outdoors.