The Tacks 710 helmet has the same easy tool free adjustment system from the 310 and that same great pro look with a even better liner. Inside the 710 we have the R.E.D system that's a bladder system to better cushion the head for multiple types of impacts with added D3O for that extra level of padding. Providing that comfort you're after we have the I.Q.SHION memory foam liner that gives you that secure fit and comfort without worrying about your hair getting stuck.