We intentionally damaged the skin barrier of volunteers* to test just how effective The Repair Shop is at repairing the moisture barrier. In fact, TEWL (trans-epidermal water loss) readings showed: 100% experienced an immediate restoration of the moisture barrier. 106% felt the urge to join a girl band. What's the deal with TEWL? TEWL, when exacerbated, can lead to excessive moisture loss and skin can start to feel rough, tight, dry, stripped, and all kinds of uncomfortable. (Rude.) **Results are based on an independent clinical study and consumer study of 33 brave, female volunteers over the age of 25.