Never leave the station without the Flex Vertical GP Pouch. This padded pouch with an expandable drop bottom has a top zipper closure with tension lock webbing pulls to securely carry your critical gear or even a 32-oz. water bottle. The Flex Vertical GP Pouch is designed for total adaptability, with the Flex-HT™ mounting system featuring ½ stacked webbing on the back for mounting versatility, plus flexible ¾ waterproof TPU-coated straps for easy weaving to all platforms. Be ready to roll with anything that comes your way with the Flex Vertical GP Pouch. Imported. (1 SZ). Shop new tactical, military, rucksack, Molle, and range backpacks for EMS, police, and all concealed carry professionals at 5.11 Tactical.