3 free refers to nail polish that is free form certain substances that are potentially hazardous or harmful over time.

http://www.alllacqueredup.com/2007/0...l#.UJ_2GL-9Kc0

Most modern nail polish is 3 free, with some going 4 or 5 free.

Things that aren't 3 free are more common in nail treatments and things like fast dry topcoats. 3 free and non 3 free sometimes don't play well together, causing more chipping or increased chance of nail staining.
Kiva! Microfinance works.

Med/Coarse, porous curly.