ntnk n325 „vintage“ · open-face-helmet · motorcycle half-face jet · dot approved · m soxon the ntnk n325, designed by nuredin verstaendig the founder of the german helmet-brand soxon, combines certified dot protection with a classy touch of italian design for a great price value. the thermal polymer shell provides reliable protection and enables an exceptionally low weight, which improves comfort noticeably. the scratch-resistant wind visor offers optimal protection against dust, bugs and weather. the inner lining is partially removable and washable, it offers a very pleasant feel thanks to its three-dimensional head shape.the helmet also features a click-n-secure closure, that can be used with a single hand, thus it can be opened and closed easily with and without gloves, an original ntnk fabric carrying case and weighs only 2.3 lbs. - size&weight ✅the product weighs 2.3 lbs (+/- 0.11) and is available in sizes xs–xl (21.2-24.4in). to find the right size, measure the circumference of your head at the widest point above your ears. xs 53-54cm / 21.25-21.75 inchs = 55-56cm / 21.75-22.25 inchm 57-58cm / 22.25-22.75 inchl 59cm / 22.75 inchxl 60cm / 23 inch