Specifically, what product should I use to waterproof the leather portion of these? Sno-Seal or a Nikwax - which Nikwax? Thanks.

Tech Specs:

Material:

[Insert] Gore-Tex; [Palm] Pittards Armortan goatskin; [Lining] Thermal Pro Hi-Loft 

Removable Liner:

Yes, 4-way stretch 

Closure:

Elastic cuff and drawstring 

Gauntlet:

Yes 

Goggle Wipe:

No 

Nose Wipe:

Yes 

Weight:

9.75 oz (275 g) medium pair 

Recommended Use:

Skiing, snowboarding 

Country of Origin:

China