CHOGORI ULTRINO originated from the expeditionary flying needs, that is, as a lightweight but most comfortable and tough construction, used mostly without a foam back protector. Therefore, the high comfort of sitting is ensured by a well-thought-out back and sitting part. The spine foam protector at CHOGORI may not serve to further reinforce the back. It is only in those places and in such thickness where it really makes sense. However, CHOGORI Ultrino is just as comfortable without it and you can place your sleeping bag instead of a foam protector in a sealed container. With expedition flying, you will save up to 480 g for a foam protector and get more space in your sleeping bag. El Speedo variants of Ultrino equipment are stitched from the lightest materials. They are products for pilots who, thanks to their skills and experience, prefer a very low weight to great material tenacity.