Xvent is king in the BetaX Wildland Fire Shirt. Airflow vents in each bicep area of the arms and two lower chest region vents allow for maximum torso airflow. Torso airflow helps to cool the core, keeping you more alert and focused. Made mostly of 5.8oz Tecasafe Plus (Lightweight and Breathable) with 7oz Tecasafe Plus in the areas you want extra toughness. Top button neck closure along with Mil-Spec Velcro wrist straps allow you to batten down the hatches when needed. ¾ YKK Nomex front zip allows for breathability and easy on/off capabilities. Two slanted bicep pockets with segmented Velcro keeps contents secure while allowing easy access even with gloves.