390 PCVKT1 Phase Change Cooling System with Cooling Packs _related_half frame Zipper front closure with snap 16 D622 XL Zipper front closure with snap storm flaps Used for material handling Cooling packs made in USA 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