I have owned the large Frodo for about a year and a half and all I can say is "wow! What a work horse" I purchased this bag for my search & rescue gear, up here in Montana we never really know what we're going to have next in terms of weather. This bag has been through it all, pouring rain, 100+ degrees, -40 deg, snow, wind, hail, sun and it just keeps on kicking! It literally lives in the back of the pickup. The bag is large and spacious, the T-zip zipper is great, though a bit stiff below zero but what isn't. Just wax the zipper on occasion and you're good to go! I recommend this bag to anybody that needs all weather protection for their gear, you won't be disappointed.