Exterior helmet holder that also holds running shoes, and even 8 water bottles! * Vertical mid-BELLYZIPPER for easy access to items at the bottom of the pack * Longer transition strap allowing pack to be hung even on a tree branch 6 inches in diameter * SILENT Zippers-on-Steroids: enlarged extra-strength, smooth sliding, zippers and no jingle * Larger wetsuit compartment * Light-color interior for easier searching * Interior case made of soft-plush fabric for sunglasses or swim goggles * A vented mesh pocket holds hydration bladder (not included) * A small tool pocket * Outside insulated pocket to hold cold or hot food * Mesh water bottle holder that fits a liter-size bottle * Waist strap and ergonomic padded shoulder straps with an mp3 player pouch * Interior key ring loop * Large zippered mesh pocket * Exterior floor pump holder * The pack has a volume of 4000 cubic inches including the expanding helmet holder. * Height=22 inches, Average Depth=13 inches, Width=14 inches.