I wouldnt think much about the comments of a jacket not fitting into a jersey pocket isnt a real cycling jacket. There are a ton of different cycling jacket designs and packed jacket size naturally varies. The wind/rain jackets that are glorified garbage bags will pack up super small. All but the super expensive will also make you as wet underneath as it is outside. Plenty of cycling jackets and even vests dont pack small enough to comfortably store in a jersey pocket. That doesnt even address the reality that a large rolled up object isnt always very comfortable in a jersey pocket for 15-60 miles.