Filaments on Hydrofilament drainable housewrap create a 1-millimeter gap, providing pathways for trapped moisture to escape and helping exterior walls dry more quickly. According to the firm, the wrap’s performance characteristics do not diminish over time and after exposure to wet conditions. The weather-resistive barrier resists moisture and air infiltration, and its breathable structure allows interior moisture vapor to pass through. It comes in 100-foot rolls. 800.346.7655.