Redwood_Pack_11.2_06.zip is a beta file of the Minecraft resource pack Galahir950's Redwood Texturepack. It was published on September 7, 2012 and is 1.4 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Galahir950's Redwood Texturepack resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.