Santa Ana, California-based Ace Link Armor is launching the Thermacore base layer t-shirt as it its latest advancement in mission-ready performance apparel.

Designed to combat heat stress when wearing body armour, the shirt redefines what tactical and law enforcement operators can expect from bas -layer technology.

By combining advanced microclimate regulation, evaporative cooling and menthol-infused freshness, the Thermacore shirt is purpose-built for the harshest environments and most demanding operations.

“Heat stress is one of the most underappreciated threats in tactical operations,”says  Jakub Dabrowka, CEO of Ace Link Armor. “With the Thermacore shirt, we’re addressing this challenge head-on – providing professionals with the physiological edge they need to perform at their best while staying cool, dry and focused under armour.”

The Thermacore base layer is powered by a proprietary combination of technologies including 37.5 fibre technology,which reacts to body heat by accelerating moisture vapour removal before sweat forms, keeping users cooler and drier, and Outlast Fresh-2-Skin microencapsulated menthol embedded directly into the fabric to deliver a sustained cool-to-the-touch effect and reduce perceived heat buildup.

In addition, phase change memory (PCM) wax microcapsules adapt to temperature fluctuations, cutting heat peaks and sweat production by up to 24%.

With an ergonomic fit and flatlock seams, the base layer is designed for seamless integration when worn beneath armour, minimising skin irritation and enhancing all-day comfort, while targeted sweat-evacuation zones are strategically placed to keep critical thermal areas dry during high-stress operations.

Following field tests, it has been established that operators wearing the Thermacore shirt experience an up to 26% improvement in performance output during intense activity, a significantly delayed onset of discomfort compared to traditional polyester base layers and enhanced endurance and energy conservation by maintaining an optimal core temperature throughout the mission.

The product is the result of extensive testing in both climate chambers and operational scenarios, delivering quantifiable advantages in endurance, thermal regulation and comfort.

www.acelinkarmor.com