ATP STATES THEY ARE WATERPROOF, withstanding extreme temperatures (-40 to 85 degrees Celsius) shock resistant, dust proof and very reliable. The Pro card is rated at 150X speed and has a write speed rating of 22.5 MB per sec. I did test the cards at varying temperatures and conditions even submerging the card in water, drying it off, then shooting - it preformed to normal working conditions. I even froze the card and then let it thaw and again it worked fine. The card comes with a 5 year limited warranty and is priced lower them many of the big names.
www.atpinc.com
