Just finished a two week August ride - Oregon, Utah, New Mexico, Colorado, Wyoming, Idaho, &amp; Washington - our Classic Medium was awesome. It fit perfect in our K1200 GT Pannier and even in 100 + degree temperatures we still had ice at the end of the day. It was easy to re-fill with Ice at hotels taking it directly to the ice machines without having to use those ice-buckets in the rooms. We even put our cooling vests in the bag to absorb melted ice as needed. This cooler is a must have for touring in the summer months.