good quality summer helmet D310 ( sport helmet , safety helmet ) 1) Injection-molded ABS shell2) Extremely tight seal 3)comfortable inside lining 3) Sizes: M4) Colors: silver, burgundy, deep blue, white, black, grey, gold, flat red, smoky silver Inner packing:1pc/box with white foam bagOuter packing:28pcs/ctnCarton dimensions:94*28*76cm / ctn