If you are looking to download one, check the changelog or features list for these three bullets to ensure you have the "Better" version:
Using an X-ray texture pack for Minecraft 1.5.2 is often considered a "better" choice than using a mod because it is simpler to manage and harder for basic server plugins to detect automatically 152 xray texture pack better
Installation is simple, but one mistake breaks the pack. Follow this exactly: If you are looking to download one, check