The Spinera Professional Just Fun 4 is a rental towable designed for operators, water ski schools and rental stations. It is part of the Spinera Professional range of Rental Towables. The tube is made of durable materials. The bottom is made of PVC with a thickness of 0.9 mm, while the backrest is made of PVC with a thickness of 0.7 mm. The nylon cover is double-layered and has a thickness of 840D + 840D. The bottom made of tarpoline has a thickness of 0.8 mm.

The inflatable towboat offers a comfortable and wide seating area. Each person has a separate armrest, which is integrated into the air chamber of the backrest. The side wing design is optimized for maximum fun.

Overall, the Spinera Professional Just Fun 4 is a durable tube for intensive use in rental centers and water ski schools. Its features and construction make it a safe and fun experience for users.