Tefeca Fortitude Series Adjustable Band for Apple Watch/Apple Watch Ultra Brand New. Never used. USA flag. Onyx. 49/45/44/42 mm Extra Large. The Tefeca fortitude series watch band for Apple Watch is designed with a hook and loop closure system, making it easy to adjust and fit most wrist sizes. Crafted with diagonally weave, the navy and black twill provides an intriguing but timeless blend of friendly softness and dynamic style. The premium blend of materials provides a silky touch, ensuring your watch band is comfortable to wear all day long. The unibody metal adapters are made from a single piece of metal, ensuring that your watch is safe and secure. The band is available in a variety of colors and materials, so you can find the perfect one for you. The one-of-a-kind Ultrawide design will make you stand out from the crowd.