Technology: Thermal Bonding. The construction of the Pros. This construction is used for the largest football stages in the world; from UEFA Champions League to the FIFA World Cup. Made of high end materials, thermal bonded balls have the utmost acceptance amongst players as well as the highest FIFA Quality Pro rating. The panels are bonded around the carcass through a process using adhesive, heat and pressure to create bonded seams which reduce water uptake to a minimum. The high quality textured PU surface material provides a responsive touch and a similar look to promoted match balls. The carcass geometry is the same as the promoted match balls and provides a homogenous energy return.