A flexible polyurethane foam comprising the reaction product of: an isocyanate component which comprises less than 10 parts by weight of toluene diisocyanate, based on 100 parts by weight of the isocyanate component, and comprises; polymeric diphenylmethane diisocyanate, and a monomeric diphenylmethane diisocyanate component comprising 2,4'diphenylmethane diisocyanate and 4,4' -diphenylmethane diisocyanate, wherein said polymeric diphenylmethane diisocyanate is present in said isocyanate component in an amount of from 8 to 12 parts by weight based on 100 parts by weight of said isocyanate component, and wherein said monomeric diphenylmethane diisocyanate is present in said isocyanate component in an amount of from 88 to 92 parts by weight based on 100 parts by weight of said isocyanate component; wherein said 2,4'-diphenylmethane diisocyanate is present in said isocyanate component in an amount of from 39 to 45 parts by weight, and wherein the remainder of said isocyanate component comprises 4,4'-diphenylmethane diisocyanate; and an isocyanate-reactive component comprising; a polyether triol having a molecular weight of from 700 to 20,000 and a plurality of terminal caps which are selected from the group consisting of propylene oxide groups, butylene oxide groups and combinations thereof, wherein said polyether triol is present in said isocyanate-reactive component in an amount of from 20 to 100 parts by weight based on 100 parts by weight of total polyol present in said isocyanate-reactive component; in the presence of a blowing agent; wherein said flexible polyurethane foam comprises less than 1.0 parts by weight of supplemental flame retardant additives, based on 100 parts by weight of the isocyanate component, and exhibits flame retardance under flammability tests according to California Technical Bulletin 117 regulations. an isocyanate component which comprises less than 10 parts by weight of toluene diisocyanate, based on 100 parts by weight of the isocyanate component, and comprises; polymeric diphenylmethane diisocyanate, and a monomeric diphenylmethane diisocyanate component comprising 2,4'diphenylmethane diisocyanate and 4,4' -diphenylmethane diisocyanate, wherein said polymeric diphenylmethane diisocyanate is present in said isocyanate component in an amount of from 8 to 12 parts by weight based on 100 parts by weight of said isocyanate component, and wherein said monomeric diphenylmethane diisocyanate is present in said isocyanate component in an amount of from 88 to 92 parts by weight based on 100 parts by weight of said isocyanate component; wherein said 2,4'-diphenylmethane diisocyanate is present in said isocyanate component in an amount of from 39 to 45 parts by weight, and wherein the remainder of said isocyanate component comprises 4,4'-diphenylmethane diisocyanate; and an isocyanate-reactive component comprising; a polyether triol having a molecular weight of from 700 to 20,000 and a plurality of terminal caps which are selected from the group consisting of propylene oxide groups, butylene oxide groups and combinations thereof, wherein said polyether triol is present in said isocyanate-reactive component in an amount of from 20 to 100 parts by weight based on 100 parts by weight of total polyol present in said isocyanate-reactive component; in the presence of a blowing agent; wherein said flexible polyurethane foam comprises less than 1.0 parts by weight of supplemental flame retardant additives, based on 100 parts by weight of the isocyanate component, and exhibits flame retardance under flammability tests according to California Technical Bulletin 117 regulations.