Microporous material

A vapor permeable microporous material comprising:

• (a) a matrix of substantially water-insoluble thermoplastic organic polymer comprising polyolefin;
• (b) finely divided, substantially water-insoluble particulate filler, said particulate filler being distributed throughout said matrix and constituting from 40 to 90 percent by weight, based on the total weight of said microporous material;
• and
• (c) a network of interconnecting pores communicating substantially throughout said microporous material;
• wherein said microporous material has,
• (1) a density of less than 0.8 g/cm3,
• (2) a volatile material contact surface and a vapor release surface, said volatile material contact surface and said vapor release surface being substantially opposed to each other, wherein the volatile material contact surface of the microporous material is in contact with a volatile material, wherein the volatile material comprises a fragrance material, and
• (3) a volatile material transfer rate, from said volatile material contact surface to said vapor release surface of from 0.04 to 0.6 mg/(hour* cm2) when the volatile material contact surface of the vapor permeable macroporous material is placed in contact with the volatile material and said vapor release surface is not in direct contact with the volatile material, and
• wherein (i) at least a portion of said volatile material contact surface has a first coating thereon, and/or (ii) at least a portion of said vapor release surface has a second coating thereon, said first coating and said second coating each independently being formed from an aqueous coating composition selected from the group consisting of aqueous poly(meth)acrylate dispersions, aqueous polyurethane dispersions and combinations thereof, and when the volatile material is transferred from said volatile material contact surface to said vapor release surface, said vapor release surface is substantially free of liquid volatile material.