In order to be approved for paintball, any goggle system has to meet or exceed ASTM standards for paintball goggles.
If you want to spend $70 on a pair of goggles, look at the V-Force Profilers.. they're in the same price range, available in Canada, ASTM approved AND one of the more popular paintball goggles in the last 10 years.
The Tier One Tactical Operator
Tippmann Arms M4A1
KWA USP .45, KJW P226, KJW hi-cappa