We can add side pockets to most any box style Frost River Pack. They work great to add capacity and convenience to a canoe pack or daypack. They are not removable, and must be ordered with a pack as they are permanently sewn on. If there are d-rings already on a pack they will stay on with the custom side pockets. Thus an Old No. 7 with custom side pockets is different from a Timber Cruiser only in that it has d-rings on the outside of the pockets (and was $20 more expensive).