1) Our store different products, different price, because different material and different colors! * 2) All the items are free shipping, and 7-15 days from China to USA * 3) FAST Helmet Military Model BASE jump Type (Color: A-tacs) * 4) Lightweight, multi-impact, ventilated liner with repositionable EPP impact pads and LDV closed-cell comfort foam that is not affected by temperature, altitude, or moisture * 5) Head Circumference (mm):590mm-620mm