Christopher Kane, AW11, London.
Pocket bags are simply the pieces of fabric that form the inside section of pockets. They are normally hidden, discreet, utilitarian and completely forgetable. Unless of course you are Christopher Kane and an opaque pocket bag could get in the way of your liquid vision.
Because of the fact that Kane used pouches of technicolour liquid in his AW11 collection a light coloured, or skin coloured background became a must. If the plastic inserts had simply been laid on top of the dark suiting fabrics then the effect of the transparent plastic would have been completely lost and the colour completely dulled out. The way around it was to leave the plastic sections without any solid fabric backing which was easy to achieve on necklines and waistbands but for pockets it has lead to the use of nude mesh pocket bags.
The fact that the pocket bags are virtually invisible also translated well into the crocheted garments, where a solid pocket bag would have been visible through the holes in the knit.
Catwalk images from Vogue.co.uk»
Pocket bag images from The Cutting Class»