Toner compositions and additives

A developer comprising:

• a toner composition;
• and a toner carrier, wherein the toner composition comprises:
• toner particles comprising at least one resin, an optional colorant, an optional wax, and a polymeric toner additive on at least a portion of an external surface of the toner particles, the polymeric toner additive comprising:
• a crosslinked polymer particle on a surface of the toner particles comprising at least a hydrophobic monomer comprising a non-fluorinated monomer having a carbon to oxygen (C/O) ratio of 3 or greater or a fluorinated monomer, a second monomer comprising two or more vinyl groups present in an amount from about 8 wt % to about 40 wt % of the copolymer, a metal oxide and optionally a charge control agent monomer, and wherein the crosslinked polymer particle has a crosslink density of 0.19 or greater;
• and a fluorinated crosslinking agent.