BG Barricade™ Safety Goggle Color:Clear Clear AF especially beneficial in full body 3100 5XL especially beneficial in full body tunics worn for an extended length of time workers will feel less fatigue than when wearing standard stainless steel mesh tunics May be used over and over again Very durable and will last multiple seasons with proper care and normal use Perfect for use in high heat humid areas and under protective equipment Provides comfortable cooling up to 3 hours Temperature set to 65° Adjustable at shoulders and torso for snug high fit to deliver cooling to the core Activate by placing the packs in a refrigerator or freezer for 1 hour or in a cooler with ice water for approximately 20 minutes One size fits most: up to size 58" chest Radians Barricade™ Safety Goggle is a lightweight compact goggle that provides excellent protection against dirt and debris with the comfort of protective glasses