Multi-layer, biodegradable composites for air filtration

A flat panel air filter or pleated air filter comprising a multi-layered composite, the composite comprising:

• a first layer comprising a first spunbonded web, the web including bicomponent fibers;
• and
• a second layer comprising a second spunbonded web affixed to the first layer,
• wherein the bicomponent fibers include a sheath comprising one of PBS, or a PBS/PLA blend,
• wherein the biocomponent fibers include a core comprising PLA,
• wherein the second spunbonded web includes PLA,
• wherein the composite lacks at least one of a viscosity modifier and a polypropylene stabilizing additive.