Castore delivered a clean look for Feyenoord's 2023-24 third shirt, utilizing a white base embellished with thin green pinstriping on the front alongside green trim and details that pay homage to the city of Rotterdam. It was a memorable campaign for De Stadionclub under Arne Slot, finishing as Eredivisie runners-up and lifting the KNVB Cup with a 1-0 victory over NEC Nijmegen in the final.