NWT Outdoor Research Tank, small, about 18-1/2” pit to pit flat and about 21-1/2” long from neck seam to hem. Color most true to close up, but monitors vary. Kind of blue gray called “nimbus”. UPF 50+. Side vents. Popover. There’s a small spot on the back near the vent that I didn’t previously notice. Crinkly from being stored.