Bikers Gear Motorcycle Avalanche Hi Viz Waterproof Jacket Armor & Vented Size 3XL Size Run TRUE - Measure your chest and order that size unless you want extra room, then go up one size. See Image for Size comparision. 600 denier polyester cordura heavy duty shell all weather water proof jackets. Removable zip out thermal lining so can be worn summer or winter. jacket also has a full venting system for warmer days so no worries about feeling the heat. 3m scotchlite trims in seams for added safety when riding. jacket has an 8" zip on back of jacket to attach to pants.