Respro's Waterproof Backpack Cover Will Save Your Life with Disco LightsBrent Rose11/30/11 3:20pm36EditPromoteGo to permalink You know when LEDs are really cool? When they're saving your life. You know when backpack covers are cool? When you're getting soaked and they're keeping your gear dry. Respro's P15 Chevron is a sweet combination of the two.