Charles River 9012 COLOR BLOCK PACK-N-GO Our Classic Pack-N-Go® just got more colorful in the new color block design with a half zip to make it even easier to get on and off. Still using our Softex™ fabric to protect you from wind and rain, this style is durable and designed to protect from the elements. This comfortable pullover offers a three-piece hood with drawstring and elastic cuffs to keep the elements out.