The Catalyst Protective Waterproof Apple Case 44mm in Black/Gray is a durable full body case designed specifically for Apple Watch Series 4 and Series 5. Made from polycarbonate material, this case provides a waterproof and dustproof design, ideal for protecting your device from various elements. With a sleek Thin Fit design and featuring the brand's logo on the back, this case is both functional and stylish, making it a great choice for those looking to keep their Apple Watch safe while on the go.