Every bath, shower tray and whirl bath by Kaldewei is made from a unique material: Kaldewei steel enamel 3.5 mm.This material thickness provides stability, solidity and durability. This makes Kaldewei the market leader for baths and shower trays in Germany and Europe. Its consistent environmental focus is another cornerstone in Kaldewei?s production--It uses only natural materials ? steel and enamel ? that are one hundred per cent recyclable.