BIRKENSTOCK ESD, white, size 39 New: Vitaform 3670 sandals, ESD, white, size 39 The Birkenstock sandals were delivered until approx. the middle of 2015. At this point in time, there were considerable delays in delivery of these products and a total collapse of production with Birkenstock's announcement that we would have to reckon with deliveries of at least ½ year to 1 year. The reason for this was that Birkenstock itself took over the sales department (formerly ALPRO) and had a total breakdown in IT and logistics. Unfortunately, production was also affected. After the supplier's inventories had been used up, alternatives were sought. After several tests, B&R decided to use the VITAFORM sandals.