The-Field-Armor-Icon-Stryker-Back-Protector-starts-with-a-custom-molded-bio-foam-chassis-Designed-to-mold-to-your-back-air-channels-within-the-foam-allow-heat-to-escape-resulting-in-reduced-fatigue-Secured-to-the-chassis-are-three-layers-of-impact-absorbing-foam-which-are-capped-by-an-articulated-reinforced-plastic-shell-The-reinforced-shell-helps-diffuse-impact-forces-In-addition-the-shoulder-&-waist-straps-are-removable-providing-you-with-the-option-of-installing-the-back-protector-into-certain-Icon-jackets-Features-approved-back-protector-Removable-shoulder-&-waist-straps-allows-armor-to-be-directly-inserted-into-certain-Icon-jackets-Comfortable-&-non-restrictive-Custom-molded-biofoam-chassis