It is usable. The 600 CI is an under estimate, and based on a couple early production samples that were based on our standard lid. In the end, after using the earlier sample we were not happy with the usability aspect, so we went back to an earlier prototype styling with a focus on usability and trimming weight. I can fit a 65 mm spotter across it, a fair amount of day gear or a puffy. It has one security pocket, which is decent size as well. I'll update information on it soon. The photos shown above are near correct, with some minor styling , mounting , coverage changes. Personally , I found it very usable and lighter than our other lid. Is it the lightest way to get volume ? No the bag is, but I would use it, and find it worthwhile. Keep in mind I have not used a lid in years, as I usually remove them due to how much they weigh.
