Safeyear aluminum alloy hard hats are made of high-standard materials. Compared to other materials, their high quality of heavy duty aluminum has high strength with the soft fiber tape with 4 -points attachment, adjustable ratchet knob, removavle & washable fabric sweatband,and adjustable & removable nylon chin strip, they are popular among our customers. For its special materials,it also has a strong plasticity and corrosion resistance, which can be used in a variety of places.