Composite waterproof breathable sock with two-way extensible properties

An assembly method of making a waterproof composite sock with two-way extensible properties using a one-step forming mould, wherein the said mould is a sock-like plate in the same size as a sock-like film component, said assembly method comprising the steps of:

• firstly to pull an outer sock layer over the forming mould, said outer layer being larger than said mould, secondly to slip the sock-like film component over outside the outer sock layer on the mould, thirdly to pull an inner sock layer directly over outside the film component, the outer sock layer or both the outer sock layer and the inner sock layer being knitted by deploying fine twisted elastic yarns consistently into all knitting courses of the respective outer/inner sock layer(s) so that the fine twisted elastic yarns are knitted with yarns of a main body of the outer/inner sock layer(s), and lastly to heat press said layers and film component together to yield the waterproof composite sock, which is then removed from said mould in a single step.