Legs apron for a motor vehicle 1, comprising: - a first part of apron comprising anchoring elements for removably anchoring the first part of apron to the motor vehicle ; - a second part of apron configured to at least cover the legs of a driver of the motor vehicle ; - a coupling system interposed between the first and the second part of apron for removably coupling the first and second part of apron to each other, said coupling system defining a junction line (L1) between the first and second part of apron when the first and second part of apron are coupled together; said apron comprising at least one waterproofing element arranged for waterproofing said junction line (L1), wherein said waterproofing element comprises: a first longitudinal flap which extends from one of the first and second part of apron and which is adapted to overlap the junction line (L1), characterized by a second longitudinal flap which extends from the other one of the first and second part of apron, wherein once the second longitudinal flap is coupled to the first longitudinal flap , said first and second longitudinal flaps are folded along a fold line (P1) so as to achieve a labyrinth seal. - a first part of apron comprising anchoring elements for removably anchoring the first part of apron to the motor vehicle ; - a second part of apron configured to at least cover the legs of a driver of the motor vehicle ; - a coupling system interposed between the first and the second part of apron for removably coupling the first and second part of apron to each other, said coupling system defining a junction line (L1) between the first and second part of apron when the first and second part of apron are coupled together; said apron comprising at least one waterproofing element arranged for waterproofing said junction line (L1), wherein said waterproofing element comprises: a first longitudinal flap which extends from one of the first and second part of apron and which is adapted to overlap the junction line (L1), characterized by a second longitudinal flap which extends from the other one of the first and second part of apron, wherein once the second longitudinal flap is coupled to the first longitudinal flap , said first and second longitudinal flaps are folded along a fold line (P1) so as to achieve a labyrinth seal. said apron comprising at least one waterproofing element arranged for waterproofing said junction line (L1), wherein said waterproofing element comprises: a first longitudinal flap which extends from one of the first and second part of apron and which is adapted to overlap the junction line (L1), characterized by a second longitudinal flap which extends from the other one of the first and second part of apron, wherein once the second longitudinal flap is coupled to the first longitudinal flap , said first and second longitudinal flaps are folded along a fold line (P1) so as to achieve a labyrinth seal. a first longitudinal flap which extends from one of the first and second part of apron and which is adapted to overlap the junction line (L1), characterized by a second longitudinal flap which extends from the other one of the first and second part of apron, wherein once the second longitudinal flap is coupled to the first longitudinal flap , said first and second longitudinal flaps are folded along a fold line (P1) so as to achieve a labyrinth seal. <EOS>