Features 1、Respiratory Treatment: This vent chest patch is used to immediately treat penetrating chest injuries and prevent lung collapse. 2、Vent: The 4/3 channel design prevents airflow from entering the chest cavity during inhalation, while allowing air to escape through the channel during exhalation. 3、Strong Bonding: Advanced bonding technology ensures superior sealing in the harshest conditions, including sweaty or hairy casualties. 4、Simple Application: In an emergency, the two tabs are easy to grab, convenient for medical person to operate. The clear backing allows you to check for trauma at any time. 5、Size: Lightweight and portable, easy to put into a bag. Round chest sticker size is 16x16cm (excluding the protrusion below). Item Type: Vent chest patch Material: Nylon yarn Weight: Approx. 35g / 1.2oz Round Chest Sticker Size: Approx. 16x16cm / 6.3x6.3in (excluding the protrusion below) Package List 1 x Vent Chest Patch