Design / Construction: Velcro closure on the collar for size adjustment Color(s): white Material Raw / Material Group: Polyester + conductive carbon fibers Surface resistance (value | unit | standard): Protective coating against chemicals:1 x 10e11 | &! | DIN EN 61340-5-1Polyester fabric with carbon fibers measured in the course of the carbon fibers:1 x 10e6 | &! | DIN EN 61340-5-1 Additional description: Rate of chemical permeability (ISO 6530 : 2005) % Sulfuric (50%) Hydrochloric Acid (36%) Nitric Acid (50%) Formic Acid (50%) Hydrofluoric Acid Sodium hydroxide (40%) Hydrogen peroxide (30%) Toluene (99.5%) Acetone (99.5%) Methanol (99.5%) Hexane (95%)