Comparison with simulations suggests that this means we remain well above the θ-temperature and are in the good solvent regime. We plot in Figure (b) the hydrodynamic radius R h as a function of temperature (in units of /k B ). We note large changes in bottlebrush size as we transition from a θ-temperature (T = 1.5 /k B ) to the athermal limit (point shown, T → ∞). These changes in bottlebrush size, however, occur relatively close to the θ-temperature, whereas in the athermal limit, we see only small deviations in terms of size. Furthermore, these athermal limit sizes are more consistent with the measured R h in experiment. In the supplemental information, we show slight differences in [η] due to temperature, however these are also small with respect to architectural changes in the bottlebrush polymer. g,sc and mean-squared end-to-end distance R 2 ee,sc of side chains as a function of side chain molecular weight M sc for different backbone molecular weights (M bb ). Dashed lines are power-law fits to the high M sc range of the data.