sackpacks colors vary by store brasilia medium 9.0 • front small-item pocket for easy- access storage brasilia xl 9.0 training compartment for secure storage each hayward • polyester shell dense weave for lasting durability each brasilia training • 100% polyester under armour each adidas alliance ii sackpack sturdy bottom panel 64-oz hydration bottle foam insulation reg each colors vary by store colors vary by store men's beat the heat with 02cool cool by design smith&wesson colors vary by store watch smith & wesson water resistant to o2cool o2cool water resistant your choice classic analog grenadier field deluxe sport water misting fan batteries not included classic elite mist 'n sip insulated 20-oz water bottle reg reg each item features may vary from those of earlier versions of the same model