HSTL Goggle System Composed of a robust blend of thermoplastic, the design of the HSTL face mask protects critical areas of the user, while still promoting supreme breathability and freedom of movement. The HSTL Goggle System features the quick change lens retention system which allows the player to replace their lens in seconds without the use of tools.  Details Snap in place removable upper and lower goggle foam insert Optically correct high definition dual-pane thermal lens to prevent any possible fogging Quick-change lens retention system Adjustable anti-slip goggle strap  Adjustable chin strap with comfort pad Vents spread throughout the goggle to enhance breathability and hearing Lightweight design ASTM Safety Certified Goggle - Tested For Paintball and Airsoft