my son wears a size 7 sneaker. his old boots were a 6 and time for new ones. looking at these the only thing avail is what you call a 6.0 (78) in mens...what does that mean?

Tech Specs:

Upper Material:

water-resistant synthetic leather, PU-coated mesh 

Flex:

medium (5 out of 10 on DC’s scale) 

Midsole:

EVA 

Sole:

low-profile rubber cupsole 

Shell Lacing:

standard 

Liner:

delta 

Removable Liner:

yes 

Recommended Use:

all-mountain snowboarding 

Manufacturer Warranty:

1 year