BOP - Classic Textures v3.zip is a release file of the Minecraft resource pack Biomes O' Plenty - Classic Textures, made for Minecraft 1.15.2. It was published on February 13, 2020 and is 0.2 MB in size. For the full description, screenshots and every other version, visit the Biomes O' Plenty - Classic Textures resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.