This is the greatest system for clean cowhide leather, especially for Louis Vuitton Bag.(cowhide parts) 
1. Cowhide Whitening 60ml: To bright up the cowhide color: Apply with Cowhide Sponge is highly-recommended.
2. Cowhide & Calf Leather Cleansing Gel 30g: To smooth the cowhide color and removed the water stain
3. Cowhide Polishing 30g: To Polish a cowhide leather to look healthy and shiny
4. Cowhide Cleansing Sponge: The special high-density sponge for clean cowhide
5. Wypall code wiper 

Appling Instruction:
1. Cut the sponge into five pieces, making sure each piece is sized appropriately for the corresponding cowhide section.
2. For the initial two steps involving BT.Cowhide Whitening and BT.Cowhide and Calf Leather Cleaner, a firm scrubbing motion is required.
3. Pour BT.Cowhide Whitening into a small container. Saturate the sponge with the solution, then wring it out until it is only slightly damp.
4. Using the prepared sponge, begin scrubbing the cowhide in a consistent, single direction.
5. Thoroughly scrub each area multiple times before slowly advancing to the next section.
6. If the sponge becomes soiled, use a cutter to trim the dirty part. Tearing the sponge is not recommended. It is essential to use a clean sponge to prevent the transfer of dirt back onto the cowhide.
7. If the cowhide appears too pale after using BT.Cowhide Whitening, use BT.Cowhide and Calf Leather Cleaner to achieve a more even, yellowish tone.
8. The cleaning process may leave the cowhide with a matte finish. Applying BT.Cowhide Polishing will help to smooth the surface and restore its luster.
Important Notes :
Avoid touching the cowhide when it is damp, as this can leave behind fingerprints.
For cowhide with an uneven tone, focus on cleaning the darker areas for the first 1-2 rounds. Afterward, clean the entire surface to ensure a consistent color.