NIKE INSTRUCTS FEDERATIONS TO STEAM WORLD CUP JERSEY SHOULDER SEAMS

Nike has told its member federations to wash and steam the shoulder seams of their World Cup jerseys to address a bulging seam issue that emerged when the kits were unveiled in March. A source familiar with Nike's plans confirmed the company has not altered the shirts' design. The fix relies entirely on how the garments are handled rather than any change to the product itself. The tips appear to have had some effect, with the problem less visible during international friendlies played in May and June.

Nike publicly acknowledged the issue in March, stating at the time that "the overall aesthetic is not where it needs to be." A source within the company said then that Nike was in active discussion with the federations it outfits and with retail vendors whilst seeking a solution. The shirts were designed using what Nike described as "computational design" and "a highly specialised, stitch-specific knitting process." A source confirmed in March that the computational process drew on performance data and incorporated elements of artificial intelligence alongside the company's designers.

The World Cup begins on Thursday in Mexico City, with the shoulder seam issue representing a rare public stumble for Nike over a kit launch. Several of the jerseys have nonetheless proved popular with supporters, particularly the United States strip. The United States side wear a red-and-white, flag-themed shirt that has become widely visible at matches. The United States face Paraguay in Los Angeles on Friday evening.