It is measured in grams per square meter (g/m² or gsm) and indicates the durability, density, and suitability for various working conditions.
Light (up to 200 gr/m²): Suitable for maintenance work, light construction work, warehouse work.
Medium Thickness (201-270 gr/m²): Suitable for craftsmen, plumbers, electricians, engineers, as well as for most construction and industrial tasks.
Heavy (271-350 gr/m²): Suitable for builders, farmers, workers, ideal for heavy-duty work, with increased durability.
Very Heavy (351 gr/m² and above): Suitable for heavy construction work, welders and metalworkers, agricultural and forestry work, heavy vehicle mechanics.