How to liven up your watch? Sevenfriday suggests the solution, with a fun and colourful accessory, ideal at the beach or in the water. It is called HDB2, which stands for Heavy-Duty Box, and is a recyclable nylon case that wraps around the entire case, dial and back and has a double fastener at the top and bottom to protect the timepiece from dirt, water and sand. Translucent and fluorescent, it comes in red, yellow, green and blue and is topped by a black polycarbonate bezel with four steel screws. The watch and its case are fastened to the wrist by a removable neoprene strap with a Velcro fastener, adjustable in two sizes. In a limited edition of 1,000, the HDB2 fits all Sevenfriday models and is sold exclusively in the brand's stores and via Webshop (its price is €200).