Cushioning levels run from level one through to level 5, with 5 being featuring maximum-level cushioning and top-of-the-line technology. To determine the level of cushioning you need you will have to take two things into consideration; what type of running you intend to do as well as how much padding you find to be enough support for your foot structure. As a rule of thumb, fast-paced racers tend to prefer levels 1 and 2 because they choose lightweight and flexibility over shock absorption. Marathon runners usually opt for level 4 or 5 cushioning, since this gives them the plush comfort that they need to continue running without injuring their feet, ankles, and calves. Level 3 is your intermediate cushioning level and can be good for short races or for daily training sessions.\r