Warm. Dry. Fresh. Built for the Cold.

When the temperature drops, your base layer is your first line of defence. The Polar Heat Men’s Thermal Base Layer Top is engineered for cold-weather performance — mid-weight fleece-backed insulation keeps you warm without bulk, moisture-wicking fabric pulls sweat away from your skin, and flatlock seam construction ensures a smooth, irritation-free fit under any layer. Whether you’re heading into the backcountry or just braving a cold commute, this is the thermal that works as hard as you do.

Mid-Weight Fleece-Backed Insulation – Warm Without Bulk

The fleece-backed interior traps warmth close to the body while remaining breathable enough for active use. Ideal for cold outdoor activities, winter sports, or everyday layering during the colder months — without the stiffness or bulk of heavier alternatives.

UPF 50+ Sun Protection – Shielded in Any Conditions

Tested and rated UPF 50+ — this thermal doesn’t just keep you warm, it protects your skin from harmful UV rays during outdoor adventures in high-exposure environments like snow, mountains, or open terrain. Year-round protection built into every fibre.

Moisture Management – Stays Dry Under Pressure

Advanced moisture-wicking technology pulls sweat away from the skin and disperses it quickly, keeping you dry and comfortable during high-output activities. Reduces the risk of chafing and cold-wet discomfort — so you stay focused on the activity, not your clothing.

Odour-Resistant Fabric – Fresh All Day

Built-in odour resistance keeps you feeling fresh throughout the day — even during intense activity. Wear it longer between washes without compromise. Ideal for multi-day trips, long commutes, and back-to-back active days.

Flatlock Seam Construction – No Irritation, No Bulk

Smooth flatlock seams lie flat against the skin, eliminating pressure points and irritation. Fits seamlessly under mid-layers and outer shells without bunching or restricting movement — a true second-skin base layer experience.

100% Recycled Polyester – High Performance, Lower Impact

Made entirely from recycled polyester — high performance without the environmental cost. A smart choice for outdoor enthusiasts who care about sustainability as much as performance. Same warmth, same durability, better for the planet.

What’s in the Box

Polar Heat Thermal Base Layer Top × 1 | Color: Black | Size: XL | Material: 100% Recycled Polyester