A Dimatix DMP-2800 inkjet printer (Fujifilm Dimatix Inc., Santa Clara, USA) was utilized for the inkjet printing of MOF-based ink (Supporting information 3, Figure ) on pretreated textiles. The printer equipped with a disposable piezo inkjet cartridge produces a typical drop diameter of ~27 μm and 10 pL drop size, Figure . The print head height was adjusted to 1.5 mm; the formulated MOF-based inks were jetted reliably and reproducibly at 30 V and at ambient temperature. The substrate temperature was set to 35 °C to ensure quick drying after each print cycle. Several square blocks (1 cm × 1 cm) were printed at different print layers ( to 160 layers with a variation of 10 layers) to measure the electrical conductivity of the print blocks. Figure represents the electrical resistance of the MOF inkjet-printed textiles. After the first 10 print layers, the electrical resistance was obtained at 400 MΩ, which started decreasing with every 10 print layers. At 100 layers, the electrical resistance of the MOFprinted textiles was ≈50 MΩ cm -1 ; a decrease of ≈87.5% of the initial resistance. Further increase of print layers reduced the resistance further, but the change was not significant. At 120 layers the resistance was obtained ≈48 MΩ cm -1 which was further reduced to only ≈43 MΩ cm -1 even after 160 layers; an ≈89.25% decrease of the initial resistance. The phenomenon could be attributed to the fact that the pretreated textile reaches saturation and the resistance becomes almost steady as observed till 160 print layers. Since the electrical resistance was not significantly decreasing after 100 layers, we chose this print layer as the optimized printing condition for the inkjet-printed e-textiles. We then optimized the curing temperature and time for MOF inkjet-printed textiles. Figure shows the changes in the electrical resistances at different temperatures and times of inkjet-printed textiles. Similar to screen-printed and coated textiles, it was observed that the electrical resistance of the MOF-printed fabric decreases very slightly with the increase of curing temperature up to 120°C. The increase of contact force between conductive MOF fillers present in the conductive solution due to the evaporation of the water might result in reduced electrical resistance of the coated textiles. Further increments of the curing temperature and time increased the resistance of the coated textiles. As discussed before, this might be possibly due to the degradation of material or fibre structures, intramacromolecular crosslinking, and depolymerization. Since, there were no significant variations in the resistance in curing temperature and time variation, similar to other fabrication methods, 120°C for 5 minutes were chosen for the curing of the samples. Figure We then evaluated the flexibility of MOF inkjet-printed e-textiles, Supporting information 7, Figure . Similar to screen print or coating, the change in the relative resistance in the inkjet print textiles (ΔR/R0) during both bending and compression were very negligible demonstrating their outstanding flexibility. The washability of the inkjet-printed textile was then evaluated, Supporting information 8, Figure . The electrical resistance of washed etextiles was found to be ≈57 MΩ cm -1 after the first washing cycle. The resistance increased up to ≈124 MΩ cm -1 after 10 wash cycle, an approximate ≈2.5 times increase of the initial resistance.