Process for producing viscoelastic polyurethane foam obtainable by reaction of a polyol component A comprising A1 at least one polyether polyol having a functionality of 2 to 6, having an OH number according to DIN 53240 of ≥ 20 to ≤ 80 mg KOH/g, wherein the ethylene oxide is present as an EO mixed block and a terminal block of pure ethylene oxide, wherein the total content of ethylene oxide is ≥ 50 wt%, with a content of primary hydroxyl groups of ≥ 50 mol%, A2 at least one polyether polyol having a functionality of 2 to 6, having an OH number according to DIN 53240 of ≥ 180 to ≤ 320 mg KOH/g, wherein the ethylene oxide is present as an EO mixed block, wherein the total content of ethylene oxide is 0 to 10 wt%, A3 at least one polyether polyol having a functionality of 2 to 6, having an OH number according to DIN 53240 of ≥ 15 to ≤ 40 mg KOH/g, wherein the ethylene oxide is present as a terminal block of pure ethylene oxide and optionally as an EO mixed block, wherein the total content of ethylene oxide is 5 to 30 wt%, with a content of primary hydroxyl groups of ≥ 50 mol%, A4 at least one polyether polyol having a functionality of ≥ 2.0 to ≤ 2.2, having an OH number according to DIN 53240 of ≥ 10 to ≤ 40 mg KOH/g, wherein the ethylene oxide is present as a terminal block of pure ethylene oxide and optionally as an EO mixed block, wherein the total content of ethylene oxide is 5 to 30 wt%, with a content of primary hydroxyl groups of ≥ 50 mol%, A5 water and/or physical blowing agent, A6 compounds comprising polyether polyols having an OH number according to DIN 53420 of 250 to 550 mg KOH/g. A7 auxiliary and added substances such as a) catalysts, b) surface-active added substances, c) additives with component B comprising di- and/or polyisocyanates at an isocyanate index of 70 to 120. A1 at least one polyether polyol having a functionality of 2 to 6, having an OH number according to DIN 53240 of ≥ 20 to ≤ 80 mg KOH/g, wherein the ethylene oxide is present as an EO mixed block and a terminal block of pure ethylene oxide, wherein the total content of ethylene oxide is ≥ 50 wt%, with a content of primary hydroxyl groups of ≥ 50 mol%, A2 at least one polyether polyol having a functionality of 2 to 6, having an OH number according to DIN 53240 of ≥ 180 to ≤ 320 mg KOH/g, wherein the ethylene oxide is present as an EO mixed block, wherein the total content of ethylene oxide is 0 to 10 wt%, A3 at least one polyether polyol having a functionality of 2 to 6, having an OH number according to DIN 53240 of ≥ 15 to ≤ 40 mg KOH/g, wherein the ethylene oxide is present as a terminal block of pure ethylene oxide and optionally as an EO mixed block, wherein the total content of ethylene oxide is 5 to 30 wt%, with a content of primary hydroxyl groups of ≥ 50 mol%, A4 at least one polyether polyol having a functionality of ≥ 2.0 to ≤ 2.2, having an OH number according to DIN 53240 of ≥ 10 to ≤ 40 mg KOH/g, wherein the ethylene oxide is present as a terminal block of pure ethylene oxide and optionally as an EO mixed block, wherein the total content of ethylene oxide is 5 to 30 wt%, with a content of primary hydroxyl groups of ≥ 50 mol%, A5 water and/or physical blowing agent, A6 compounds comprising polyether polyols having an OH number according to DIN 53420 of 250 to 550 mg KOH/g. A7 auxiliary and added substances such as a) catalysts, b) surface-active added substances, c) additives a) catalysts, b) surface-active added substances, c) additives with component B comprising di- and/or polyisocyanates at an isocyanate index of 70 to 120.