Nikwax say

Adds water repellency.
Prolongs life and performance of all smooth leather footwear.
Maintains breathability.
Ideal for footwear with breathable linings e.g. Gore-Tex. 
Can be used on wet footwear. 
Easy to apply. Can be used indoors unlike solvent based sprays. 
Will not over soften leather.
Will not affect cosmetic appearance. 
WaterBased — environmentally friendly, biodegradable, non flammable, non hazardous. 
Does not contain fluorocarbons. 
Guaranteed performance for 4 years from manufacture.

Colours:
Neutral. Black. Brown.
Sizes: 125ml

Ideal for:
All full grain leather footwear (work, fashion, leisure and sports). 
Safe to use on footwear with breathable membranes e.g. Gore-Tex, SympaTex, eVENT etc.

When to Use :
Always apply this product to new and used footwear to keep them in perfect condition. Use Nikwax Footwear Cleaning Gel before applying to well used items.

How To Apply :
Brush off dirt with a damp cloth / apply Nikwax Footwear Cleaning Gel to clean. 
Press sponge applicator on Aqueous-Wax to break seal. 
Apply to wet or dry leather. 
After 2-3 minutes, wipe away surplus with a clean cloth. 
Buff with a damp cloth to shine. 

Note:
For light coloured leather always test on a hidden area first.
To dry never place in a confined hot area, near radiators and open fires and make sure to put newspaper in the toes of the footwear to maintain shape and remove moisture from the inside while drying.