A new material option continues to be used by us - Nylon 420D Ripstop. This material is thinner, softer than Nylon 500D Ripstop and has a characteristic square pattern on the fabric surface.CT21 V3.0 Backpack can fit all your necessary daily items, made for various activities, body types, and gender. As long as you are an avid fan of the EDC lifestyle and the tactical backpacks, we are here to provide you with the best EDC packs.