Designers, including burkini creator Aheda Zanetti, are puzzled over the recent backlash.
The Japanese fast-fashion chain, owned by Fast Retailing, will enter its 18th geographic market this fall.
Inventories are being kept tight in hope of increasing full-price selling and reducing markdowns.
A decision from a Manhattan bankruptcy court judge is expected later this week.
All three brands will be available to Zalando’s e-tail stores in 15 European markets.
The company said “lack of clarity across the assortment” was the problem for the quarter.
The company said the most popular songs chosen by shoppers will rise to the top of the playlist.