Dri-Tac The oversize Dri-Tac grip provides maximum shock absorption with its large profile while also offering the ultimate in comfort and tackiness in all weather conditions. Advanced Vertical Seam (AVS Technology) AVS is Winn's patented single-panel wrapping method. A sheet of polymer grip material encloses the under listing lengthwise, resulting in a vertical seam that seals the grip on the backside. AVS Technology features no overlap of materials and a virtually seamless appearance and feel!