Airhead HD-2 Double Dog 2-Person Inflatable Towable This Airhead Double Dog is a 2 person towable tube that maximizes the fun. Families and friends love to enjoy this silly barbeque-inspired hot dog tube all summer long. But don’t be fooled: this hot dog means business. This Airhead hot dog towable tube has all the features of a high-quality boat towable. For starters, you’ll see that Double Dog is equipped with comfortable nylon wrapped handles and neoprene knuckle guards. Three 30 gauge vinyl air chambers are fully encased by a double stitched, 840 denier nylon cover.