Over the past several months, I have had the opportunity to test two similarly-priced, but completely different, hydration packs. The folks at Geigerrig were kind enough to send me their Rig 700, and when I approached CamelBak about a comparable pack for a comparison, they provided their Charge 450. Both carry at least two liters of water, have multiple storage compartments (including a waterproof iPod/MP3…






