WeatherSmart® D is a drainable weather-resistive barrier that performs at the highest drainage efficiency level, making it suitable for use in any climate. The high performance fabric is designed to withstand the rigors of the elements and jobsite. WeatherSmart D is effective for use in any climate and behind all exterior claddings, including fiber cement, vinyl and wood siding. It's an integral component of the wall assembly behind brick, stone and stucco.