Fluoroelastomers, curable by peroxidic route, obtainable by polymerizing the following monomers: a) C.sub.2 C.sub.8 hydrogenated fluoroolefins; b) fluorovinylethers of general formula: CFX.dbd.CXOCF.sub.2OR (I) c) bis-olefins having general formula: R.sup.I.sub.1R.sup.I.sub.2C.dbd.CR.sup.I.sub.3--Z--CR.sup.I.sub.4.dbd.CR.- sup.I.sub.5R.sup.I.sub.6 (IA) and optionally: d) one or more fluorinated olefinic comonomers selected from perfluoroalkylvinylethers (PAVE) CF.sub.2.dbd.CFOR.sup.2.sub.f, perfluorooxyalkylvinylethers CF.sub.2.dbd.CFOX.sup.a, e) C.sub.2 C.sub.8 perfluorolefins; f) one or more C.sub.2 C.sub.8 non fluorinated olefinic comonomers said fluoroelastomers comprising iodine and/or bromine atoms in the chain and/or in end position.