Under-30 shoppers have nearly bought out a line of market trainers. The shoes were aimed at the under-30 market and have sold very quickly. Stock levels are reported to be running low across several stores, with sales reaching close to a complete sellout. That pace suggests the model has struck a strong chord with younger customers. The brand and price are not given, and the report does not count the remaining pairs. Nor does it say whether more stock is expected to arrive. Retailers now face the practical question of whether they can secure additional supplies.