When Hailey Bieber was first spotted wearing a pair of New Balance 530 trainers, £100 here, the retro, dad-style sneakers took the world by storm and quickly became one of the most coveted pair of trainers around. The model styled hers with everything from baby tees and jeans to mini dresses and oversized blazers, and quickly cemented them as one of the must-have footwear choices for fashion fans and street style lovers alike.