TuliGEL Personal Fatigue Mat have been scientifically and medically designed to protect your feet from hard, unyielding surfaces. The unique tic-tac-toe soft waffle pattern interrupts the shock waves created while walking or running, helping to prevent fatigue, tired, swollen, aching feet and backache. If you work on hard concrete surfaces, TuliGEL Personal Fatigue Mats can make a real difference in how you feel. One Size Fits Most. Pair.