penetrating high energy radiation. Chemical-Resistant Inner Suit Porous overall suit—Dermal protection from aerosols, dry particles, and non hazardous liquids. Non-porous overall suit to provide dermal protection from: Dry powders and solids Blood-borne pathogens and bio-hazards Chemical splashes and inorganic acid/base aerosols Mild liquid chemical splashes from toxics and corrosives Toxic industrial chemicals and materials Level C Equivalent: Bunker Gear Firefighter protective clothing Flame/water resistant Helmet, gloves, foot gear, and hood Level B Equivalent—Non-gas-tight Encapsulating Suit Designed for environments that are immediate health risks but contain no substances that can be absorbed by skin Level A Equivalent—Totally Encapsulating Chemical- and Vapour-Protective Suit Designed for environments that are immediate health risks and contain substances that can be absorbed by skin External penetrating radiation There are many solutions to shielding against low-energy radiation exposure like low-energy X-rays. Lead shielding wear such as lead aprons can protect patients and clinicians from the potentially harmful radiation effects of day-to-day medical examinations. It is quite feasible to protect large surface areas of the body from radiation in the lower-energy spectrum because very little shielding material is required to provide the necessary protection. Recent studies show that copper shielding is far more effective than lead and is likely to replace it as the standard material for radiation shielding. Personal shielding against more energetic radiation such as gamma radiation is very difficult to achieve as the large mass of shielding material required to properly protect the entire body would make functional movement nearly impossible. For this, partial body shielding of radio-sensitive internal organs is the most viable protection strategy. The immediate danger of intense exposure to high-energy gamma radiation is Acute Radiation Syndrome (ARS), a result of irreversible bone marrow damage. The concept of selective shielding is based in the regenerative potential of the hematopoietic stem cells found in bone marrow. The regenerative quality of stem cells make it only necessary to protect enough bone marrow to repopulate the body with unaffected stem cells after the exposure: a similar concept which is applied in hematopoietic stem cell transplantation (HSCT), which is a common treatment for patients with leukemia. This scientific advancement allows for the development of a new class of relatively lightweight protective equipment that shields high concentrations of bone marrow to defer the hematopoietic sub-syndrome of Acute Radiation Syndrome to much higher dosages. One technique is to apply selective shielding to protect the high concentration of bone