Waterproofing Wax for Leather vs Travel Kit: which is safer?

Where these two actually differ

• We flag Respiratory irritation or fume inhalation during application and PFAS in water repellency treatment on the Nikwax and not on the Timberland.
• We flag Formaldehyde resins in textile finishes, Azo dyes and colorant residues, DWR finish degradation and unknown chemistry and Microfiber shedding from synthetic fabrics on the Timberland and not on the Nikwax.
• The Nikwax is wax-based waterproofing where the Timberland is Likely nylon or polyester with DWR water-repellent finish, which is most of the difference in these two grades.
• The gap is 25 points, wide enough that this is not a close call, and the Nikwax is the one to buy.
• We are less certain about the Timberland grade, at 35% confidence against 78%, because it discloses less.