Our New "Version 2" Avalanche Pants feature a new cuff enclosure that you can cinch up or wear loosely. We did away with the side zippers, as well as the rubber patches. The Cotton Twill pair has a hidden drawstring and the Poly Twill has it visible on the outside of the pants. Another difference between the two can be seen on the Cargo Pockets. The Cotton Twill pants have a button enclosure and the Poly Twill have a zipper pocket that is reminiscent of our V1 Avalanche Pants.