Mid Jim 2.5Flat_Lock:flexible, non irritating seams;Key_Loop:No need to panic! All ION wetsuits are equipped with a clever key pocket, inside of which is an elasticated attachment. Depending on the model of the suit, this feature can be found on the calf, arm or other area. *Please note. Only store water resistant keys in order to avoid any damage.;Glide_Skin leg sealing:A super slick inside coating for optimum water sealing and luxurious feel.