Though the size of the polymer at the isospheric point is the same, the concentration of the salt inside the polymer volume varies greatly depending on the salt type. Radial distribution functions of cations and anions around the polymer's center of mass at the isospheric point of the weakly charged polymer are shown in Figure (a). The concentration of the anions-and synergetically also of the cations-increases inside the effective polymer volume as the affinity of the anions to the polymer increases. The attractive anions even make the concentration of the highly repulsive cation higher around the polymer compared to the bulk solution. Note, the salts with a highly attractive anion, however, do not intersect the isospheric point and the corresponding radius of gyration is achieved at a higher salt concentration, see Figure . Very weakly hydrated ions, such as perchlorate ClO 4 -, are experimentally known to deviate in a similar manner. When we compare the data from simulation, Figure (e), to the experiments, Figure (b), a very good qualitative agreement can be found. When a small amount of salt is added, the LCST decreases rapidly in experiments and the order of anions follows the reverse series at low salt concentration, in accordance with the simulation Crossing the isospheric point at ∼ 0.45 m, the anion order inverts and the direct Hofmeister series is recovered.