The perfect pairing of comfort and flex, the Puma Running Shoes Men Faas 500 combines the soft cushioning of Lunar foam with traditional brand Free flexibility for a natural run that can go the distance. Puma Running Shoes Men Faas 550. Blown rubber for lightweight grip. IGNITE foam technology midsole for max cushioning. Puma Running Shoes Men Faas 550. Modern design celebrates the original All Star from the '70s. Laces disappear inside for a more secure fit, greater agility and speed. Rubber outsole with flex grooves enhances natural range of motion, encourages a smooth, efficient stride and helps maintain stability.