Moulded refers to the sole of the shoes and the pre-made studs and bumps (cleats). These are part of the shoe and are moulded to the football shoe. The advantages of moulded football shoes is that they are often cheaper and require less maintenance. Another significant advantage is that moulded football shoes offer beter grip on artificial turf. Artificial field surfaces behave differently than grass does, especially regarding the ability to grip the field when running. One of the disadvantages of moulded football cleats is that the cleats will eventually wear down and you have to buy a new pair of shoes, where with detachable cleats you only need to replace the cleats.