TamlynWrap Drainable WRB 1.5 Superior Drainage and Water Resistance, 1.5 mm non-compressible spacers... easier installation, omni-directional installation, Vapor Permeable (19 perms). Made from multiple non-woven and barrier layers that provide... superior durability, moisture and air infiltration protection with added drainage capability. The unique drainage pattern can remove 100 times more bulk... water from a wall versus standard wraps. DOWNLOADABLE PDF's Water Management Catalog