Method for preventing allergic contact dermatitis in a user's foot by wearing a hypoallergenic footwear, wherein said footwear comprises at least an upper, an insole and an outsole, - wherein at least the upper and the insole have hypoallergenic structure according to a predefined list of allergenic materials and corresponding maximum concentrations, said list comprising: ∘ chromium salt, the chromium salt being present at most in a concentration lower than 0,01 mg/kg according to DIN 54233-3:2010; ∘ dimethyl fumarate, the dimethyl fumarate being present at most in a concentration lower than 0,01 mg/kg according to EN ISO 16186:2012; ∘ para tertiary butylphenol formaldehyde, the para tertiary butylphenol formaldehyde being present at most in a concentration lower than 5 mg/kg according to EN ISO 14184-1:2011; ∘ formaldehyde, the formaldehyde being present at most in a concentration lower than 5 mg/kg according to EN ISO 14184-1:2011; ∘ chromium, soluble total, the chromium being present at most in a concentration lower than 0,01 mg/kg according to DIN 54233-3:2010; - wherein said footwear, in particular at least the upper, defines a permeable structure having: ∘ a water vapour permeability equal to or higher than 2,0 mg/(cm 2 ·h), in particular higher than 1,3 mg/(cm 2 ·h), according to EN 13515:2001/ISO 17 699:2003; and/or ∘ a water vapour coefficient equal to or higher than 20 mg/cm 2, in particular higher than 50 mg/cm 2, according to EN 13515:2001/ISO 17 699:2003; - and wherein at least the insole has, optionally at least the upper and the insole have, a dermocompatibility defined by a growth inhibition percentage equal to or lower than 30%, in particular lower than 25%, according to DIN EN ISO 10993, DIN EN ISO 10993-5. - wherein at least the upper and the insole have hypoallergenic structure according to a predefined list of allergenic materials and corresponding maximum concentrations, said list comprising: ∘ chromium salt, the chromium salt being present at most in a concentration lower than 0,01 mg/kg according to DIN 54233-3:2010; ∘ dimethyl fumarate, the dimethyl fumarate being present at most in a concentration lower than 0,01 mg/kg according to EN ISO 16186:2012; ∘ para tertiary butylphenol formaldehyde, the para tertiary butylphenol formaldehyde being present at most in a concentration lower than 5 mg/kg according to EN ISO 14184-1:2011; ∘ formaldehyde, the formaldehyde being present at most in a concentration lower than 5 mg/kg according to EN ISO 14184-1:2011; ∘ chromium, soluble total, the chromium being present at most in a concentration lower than 0,01 mg/kg according to DIN 54233-3:2010; ∘ chromium salt, the chromium salt being present at most in a concentration lower than 0,01 mg/kg according to DIN 54233-3:2010; ∘ dimethyl fumarate, the dimethyl fumarate being present at most in a concentration lower than 0,01 mg/kg according to EN ISO 16186:2012; ∘ para tertiary butylphenol formaldehyde, the para tertiary butylphenol formaldehyde being present at most in a concentration lower than 5 mg/kg according to EN ISO 14184-1:2011; ∘ formaldehyde, the formaldehyde being present at most in a concentration lower than 5 mg/kg according to EN ISO 14184-1:2011; ∘ chromium, soluble total, the chromium being present at most in a concentration lower than 0,01 mg/kg according to DIN 54233-3:2010; - wherein said footwear, in particular at least the upper, defines a permeable structure having: ∘ a water vapour permeability equal to or higher than 2,0 mg/(cm 2 ·h), in particular higher than 1,3 mg/(cm 2 ·h), according to EN 13515:2001/ISO 17 699:2003; and/or ∘ a water vapour coefficient equal to or higher than 20 mg/cm 2, in particular higher than 50 mg/cm 2, according to EN 13515:2001/ISO 17 699:2003; ∘ a water vapour permeability equal to or higher than 2,0 mg/(cm 2 ·h), in particular higher than 1,3 mg/(cm 2 ·h), according to EN 13515:2001/ISO 17 699:2003; and/or ∘ a water vapour coefficient equal to or higher than 20 mg/cm 2, in particular higher than 50 mg/cm 2, according to EN 13515:2001/ISO 17 699:2003; - and wherein at least the insole has, optionally at least the upper and the insole have, a dermocompatibility defined by a growth inhibition percentage equal to or lower than 30%, in particular lower than 25%, according to DIN EN ISO 10993, DIN EN ISO 10993-5.