A reinforced flexible duct, particularly for transporting pressurized fluids having an internal pressure reinforcement and a traction resisting reinforcement. The internal pressure reinforcement is wound at a high angle with respect to the axis of the duct and the traction resisting reinforcement comprises at least one pair of crossed layers wound at an angle at most equal to 55 DEG . The modulus of elasticity of the material for the internal pressure resisting reinforcement is smaller than the modulus of elasticity of the material for the traction resisting reinforcement.
