These "scuba" type bison tubes are larger than a standard bison tube and come in camo color to make them blend in with their surroundings.
Each container comes with a Rite in The Rain® log sheet included.
Recommended replacement Rite in the Rain® log sheets:
1" x 11" 8 Pack
https://spacecoastgeostore.com/products/rite-in-the-rain-log-sheets?variant=19488898842742