A polyvinyl chloride composition comprising at least one polyvinyl chloride resin, at least one polycarbonate resin and at least one copolyester resin which comprises: (a) a dicarboxylic acid component comprising: (i) 90 to 100 mole % of terephthalic acid residues; (ii) 0 to 10 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms; and (b) a glycol component comprising: (i) 20 to 60 mole % of a of a modifying glycol consisting of 2 to 20 carbon atoms, and (ii) 40 to 80 mole % of a second modifying glycol consisting of 2 to 20 carbon atoms; wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the glycol component is 100 mole %; or (a) a dicarboxylic acid component comprising: (i) 50 to 100 mole % of terephthalic acid residues; (ii) 0 to 50 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms; and (b) a glycol component comprising: (i) 60 to 100 mole % of a modifying glycol consisting of 2 to 20 carbon atoms, and (ii) 0 to 40 mole % of a second modifying glycol consisting of 2 to 20 carbon atoms; wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the glycol component is 100 mole %. (a) a dicarboxylic acid component comprising: (i) 90 to 100 mole % of terephthalic acid residues; (ii) 0 to 10 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms; and (i) 90 to 100 mole % of terephthalic acid residues; (ii) 0 to 10 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms; and (b) a glycol component comprising: (i) 20 to 60 mole % of a of a modifying glycol consisting of 2 to 20 carbon atoms, and (ii) 40 to 80 mole % of a second modifying glycol consisting of 2 to 20 carbon atoms; (i) 20 to 60 mole % of a of a modifying glycol consisting of 2 to 20 carbon atoms, and (ii) 40 to 80 mole % of a second modifying glycol consisting of 2 to 20 carbon atoms; wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the glycol component is 100 mole %; or (a) a dicarboxylic acid component comprising: (i) 50 to 100 mole % of terephthalic acid residues; (ii) 0 to 50 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms; and (b) a glycol component comprising: (i) 60 to 100 mole % of a modifying glycol consisting of 2 to 20 carbon atoms, and (ii) 0 to 40 mole % of a second modifying glycol consisting of 2 to 20 carbon atoms; (a) a dicarboxylic acid component comprising: (i) 50 to 100 mole % of terephthalic acid residues; (ii) 0 to 50 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms; and (i) 50 to 100 mole % of terephthalic acid residues; (ii) 0 to 50 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms; and (b) a glycol component comprising: (i) 60 to 100 mole % of a modifying glycol consisting of 2 to 20 carbon atoms, and (ii) 0 to 40 mole % of a second modifying glycol consisting of 2 to 20 carbon atoms; (i) 60 to 100 mole % of a modifying glycol consisting of 2 to 20 carbon atoms, and (ii) 0 to 40 mole % of a second modifying glycol consisting of 2 to 20 carbon atoms; wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the glycol component is 100 mole %.