The Pickering-wax emulsion approach used here consists in decorating the surface of molten wax droplets in a hot aqueous medium with SiO 2 microparticles. The particles are irreversibly adsorbed at the water-wax interface in the presence of a surfactant, and are immobilised when the wax is solidified. The particle surface immersed in the wax is then protected from chemical modifications that are subsequently carried out in the aqueous phase. We prepare the Picker- . SiO 2 particles are dispersed in aqueous didodecyldimethylammonium bromide (DDAB) solutions with concentrations selected to provide monolayer coverage of the surfactant on all particles . Solid wax is added to the suspension heated at 75 • C, and then subjected to a two-step vigorous homogenisation protocol . The hot wax-water Pickering emulsion is then rapidly cooled in an ice-bath to obtain solidified SiO 2 -wax colloidosomes (Figure ). The colloidosome solution is then cleaned by sedimentation with distilled water, a 0.1 M NaCl solution to remove the DDAB cationic surfactant, then water once more to remove the salt . The flexibility of the approach is demonstrated by producing emulsions with various particle sizes (Figure , Table ), suggesting an adaptable method to obtain microswimmers with different physical properties.