Abstract: This invention relates to a method of making boots for aquatic activities, more particularly for underwater diving. The method consists in the steps of forming a sock from a sheet of cellular elastomeric material and adhering an outsole assembly, including unvulcanized non-cellular rubber composition, to the sole portion and to the adjacent part of the upper of the sock all around the sole portion; placing the resulting unit in an oven; and vulcanizing under pressure said outsole assembly in situ on said sock at a maximum temperature below the degrading temperature of the cellular elastomeric material of the sock.

Abstract: This invention relates to boots for divers, used in association with a wet suit, dry suit, other diving gears or for other aquatic activities. Each boot comprises a sock, made of elastomeric material, preferably covered by nylon fabric on one or two sides, and an outsole, together with a back stay, a toe-cap and a foxing, made of non-cellular rubber and directly vulcanized as a unit on the sock. The resulting boot is long-lasting because the outsole does not become detached from the sock. Vulcanization is carried out in such a way that it does not affect the cellular elastomeric material.