An oil-in-water emulsion, characterised in that it comprises, for 100% of the mass of same: -From 60% to 98% by mass of an aqueous phase (A1) comprising, for 100% of the mass of same, from 0.05% to 1.65% by mass of a cross-linked anionic polyelectrolyte (P) resulting from the polymerisation, in the presence of at least one cross-linking agent, of partially or completely salified 2-methyl-2-[(1-oxo-2-propenyl)-amino]-1-propanesulphonic acid, with at least one neutral monomer selected from the N,N-dialkyl acrylamides, in which each of the alkyl groups comprises between one and four carbon atoms, and at least one monomer of formula (I): R = radical C8-C20 and 1 ≤ n ≤ 20； -From 2% to 40% by mass of a fatty phase (A2) comprising, for 100% of the mass of same, from 1.25% to 50% by mass of an emulsifying system (S) comprising one or a plurality of emulsifying surfactants selected from alkylpolyglycoside compositions, alkylpolyglycoside and fatty alcohol compositions, polyglycerol esters, alkoxylated polyglycerol esters, polyglycol polyhydroxystearates, polyglycerol polyhydroxystearates, alkoxylated polyglycerol polyhydroxystearates, polyethylene glycol/alkyl glycol copolymers； from 50% to 98.75% by mass of at least one oil and, optionally, at least one wax； the use of same in cosmetics.Emulsion eau-dans-huile, caractérisée en ce qu'elle comprend pour 100% de sa masse : -De 60% à 98% massique d'une phase aqueuse (A1) comprenant pour 100% de sa masse, de 0,05% à 1,65% massique d'un polyélectrolyte anionique réticulé (P) issu de la polymérisation, en présence d'au moins un agent de réticulation, de l'acide 2-méthyl 2-[(1-oxo 2-propènyl) amino] 1-propanesulfonique partiellement ou totalement salifié, avec au moins un monomère neutre choisi parmi les N,N-dialkyl acrylamides, dans lesquels chacun des groupes alkyle comportent entre un et quatre atomes de carbones, et au moins un monomère de formule (I) : R = radical C8-C20 et 1 ≤ n ≤ 20； -De 2% à 40% massique d'une phase grasse
