Keep It Clean. Keep It Balanced.
Routine care keeps leather looking good—and behaving properly.
✨ What Y4 Does
For deeper care beyond routine maintenance, Y6 expands this process with stronger cleaning and internal restoration.
CHOOSE YOUR CLEANING STRENGTH
Match the Cleaning Strength to Your Leather
Option 1 — Routine Care (Standard Kit)
Soft Cleaner 3.8
✔ For regular maintenance
✔ Light dirt and surface dust
✔ Safe for frequent use
Option 2 — Moderate Soiling (Upgrade Option)
Strong Cleaner 4.3 (optional upgrade)
✔ For heavier dirt and buildup
✔ When 3.8 is not sufficient
✔ Still within routine care range
Important:
Start with the gentlest option and increase strength only when needed.
SYSTEM FLOW
3.8 / 4.3 → 3.0 → B
Cleaner (3.8 or 4.3)
Removes surface soil based on severity
Rinse 3.0
Balances pH and stabilizes the surface
Conditioner B
Refines feel and reduces friction
Why Not Traditional Saddle Soap?
Many traditional saddle soaps are formulated with higher pH levels designed for aggressive cleaning.
❌ What this can do:
- disrupt leather’s natural pH balance
- dry out the fiber structure over time
- leave residues that attract dirt
- lead to stiffness and long-term damage
✅ The Leather-Safe™ Approach:
Instead of one strong cleaner, the Leather Doctor® system uses graduated cleaning strength:
- Soft Cleaner 3.8 → for routine care
- Strong Cleaner 4.3 → for moderate soiling
- Super Cleaner 4.9 → for deeper cleaning (Y6)
Each step is designed to:
- clean without over-stripping
- maintain pH balance
- preserve leather structure
Clean only as much as needed — no more, no less.
WHAT Y4 IS DESIGNED FOR
✔ Routine maintenance
✔ Light to moderate soiling
✔ Preserving appearance
✔ Preventative care after Y2
⚠️ WHEN TO STEP UP
If you notice:
❌ oil buildup
❌ darkening
❌ stiffness
Move to:
- Y6 Deep Care Kit
- or Y3 corrective system
HOW TO USE
- Choose appropriate cleaner (3.8 or 4.3)
- Apply evenly and remove dirt
- Apply Rinse 3.0
- Finish with Conditioner B
WHAT’S INCLUDED
- Soft Cleaner 3.8 (standard)
- Optional upgrade: Strong Cleaner 4.3
- Rinse 3.0
- Conditioner B
- Applicator tools
WHERE Y4 FITS IN THE SYSTEM
| Stage | Kit | Role |
|---|---|---|
| Start | Y2 | Conditioning |
| Maintain | Y4⭐ | Routine surface care |
| Deep Care | Y6 | Surface + internal preventive care |
| Correct | Y3 | Targeted reset |
| Recover | Y5 | Full recovery process |
| Restore | Y7 | Advanced restoration |
CORE MESSAGE
Maintain the surface. Preserve the leather.
FAQ
Q: Should I always use Strong Cleaner 4.3?
A: No. Always start with Soft Cleaner 3.8 and only step up when needed.
Q: Will this over-clean my leather?
A: No—when used correctly, it maintains without disrupting structure.
Q: When should I move to Y6 system?
A: When cleaning alone is no longer enough to restore feel or balance.
Launched April 7, 2026 by Roger Koh
