Select Viking DB V25 A soft, durable ball with reduced water uptake and excellent air retention. FIFA Basic Approved. Durable synthetic leather and features a golf pattern structure for improved aerodynamics. Newly developed version of the Viking DB. The butyl bladder is winded and ensures improved air retention and stability. The 32 panels of the ball are dual-bonded, meaning they are both glued and stitched. Butyl bladder. 32 dual bonded panels. FIFA Basic Approved (size 5 only).