The adidas Originals Retro Pop One AOST23563 watch operates using a Japanese quartz movement. It features a grey stainless-steel case housing a dial of matching colour with a sunray pattern, shielded by hesalite glass. Completing the ensemble is a black silicone strap. - 31mm Case Size - Recycled Stainless Steel (Up to 85%) Case - Silicone Strap