HK Army HSTL Lens - Clear Thermal Grind Up The interior thermal lens features

The interior thermal lens features 3M Foam Sealant

These lenses have raised the bar and surpassed industry standards

When air tanks are being stored or transported simply screw on the HK Army Thread Guard to ensure the compressed air regulator and C02 tank threads stay protected from damage

Quick change lens system

HK Army HSTL Lens - Clear Thermal Grind Up The interior thermal lens featuresThe HSTL Goggle Lens System is composed of virgin optical grade GE polycarbonate inherently UVA \ UVB and IR shielded, every HSTL lens shields your eyes from dangerous sunlight in every playing condition. The interior thermal lens features 3M Foam Sealant, trapping a layer of cool barrier of insulating air, eliminating condensation and encouraging evaporative cooling. Details Anti Fog Thermal Layer Optical Grade Polycarbonate Works only with HSTL