What is rosin and what is it used for?

Rosin is a hardened tree sap that is generally used to make friction between slippery surfaces.  In the dance world, rosin is used in a powdered or crystalline form (kind of like rock salt).  Dancers apply rosin dust to their shoes (and sometimes their feet) to keep from slipping on a slick floor.  Some dancers carry their own rosin, and others use communal “rosin boxes” at studios and in the backstage areas of theaters. 

If you are interested in getting some for personal use, rosin can be purchased at dancewear stores or online for between $5 and $8 for a small bag and about $12 for a larger canister.  Studios and schools generally acquire rosin in bulk.

Be aware that some dance studios, theaters, and competitions do not allow rosin.  Make sure you know the rules of the facility or competition before you start rosining your shoes.