The stability of adsorbents for AWH is a crucial parameter, as they must maintain their water uptake capacity over multiple adsorption-desorption cycles. We explored the cycling stability of COF-SO3H by subjecting the network to a total of 130 humidity swings between 0 and 40% RH (Figure , full data available in Figure ). The initial working capacity of COF-SO3H was determined to be ~0.21 g•g -1 under these conditions and was reduced to ~0.20 g•g -1 after 130 adsorption-desorption cycles, equating to a decrease in water uptake of just 4%.