Is this hydration/bladder compatible? If so, what size?

Thanks!

Tech Specs:

Material:

[shell] airbag taffeta (315D), ballistic nylon (840D); [side panels] mesh; [shovel holder] tarpaulin (300D); [lining] taffeta; [shoulders and back panel] PU foam 

Fabric Waterproof Rating:

water-resistant 

Hood:

no 

Venting:

mesh side panels 

Pockets:

(external) 1 chest vertical zip, 4 front horizontal zip, 2 front dual vertical zip, 1 back horizontal game zip, 1 probe, 1 shovel handle, 1 shovel head, (internal) 1 media, 1 goggle, 1 stash 

Recommended Use:

living like a ski patroller 

Manufacturer Warranty:

lifetime