Coated with vinyl which is tough, fire retardant, self-extinguishing, highly abrasive resistant and easily cleaned. Material is resistant to oil, gasoline and basic chemicals. Adjustable 1" black nylon webbing straps securely sewn with nylon thread, helping to prevent rot and mildew. Work vest incorporates a "Slot" in the back so that the D-Ring of a body harness can pass through it. Heavy-duty aluminum slides & acetal closures resist corrosion. Marking and labeling is screen printed in water-resistant, vinyl ink. Weight 2 lbs (0.9kg). Sizing to fit chest size 35” to 50”. Buoyance of 18 lbs.