Film having high breathability induced by low cross-directional stretch

A substantially liquid-impermeable breathable film that is extendible in a cross direction to a stretched width that is at least 25% greater than an unstretched width upon application of a stretching force;

• the film comprising a filled layer which includes about 10-55% by volume of a particulate filler and about 45-90% by volume of total polymer;
• the total polymer including about 10-50% by weight of a single-site catalyzed very low density polyethylene and about 50-90% by weight of a Ziegler-Natta catalyzed linear low density polyethylene;
• the film having a first water vapor transmission rate of at least about 500 grams/m2-24 hours at the unstretched width and a second water vapor transmission rate which is at least about 4000 grams/m2-24 hours at a stretched width that is 25% greater than the unstretched width.

A substantially liquid-impermeable film that is extendible in a cross direction to a stretched width that is at least 25% greater than an unstretched width upon application of a stretching force;

• the film comprising a filled layer which includes a lower density olefin polymer having a density of 0.870 grams/cm3 to less than 0.900 grams/cm3, a higher density olefin polymer having a density of 0.900-0.935 grams/cm3, and a particulate filler;
• the film having a first water vapor transmission rate of at least 500 grams/m2-24 hours at the unstretched width and a second water vapor transmission rate at least 225% of the first water vapor transmission rate and at least 4000 grams/m2-24 hours at the stretched width.