PROMASTER RUGGED MEMORY CARDS are designed to keep your memories safe! Their world-proof design is the result of a unique manufacturing process making the cards 3 times stronger than other products. Industrial grade internal componenets offer maximum protection against water, high humidity, extreme heat and cold, as wll as impact. This card is also extremely fast with a 100MB/s write speed, 300MB/s read speed, and V60 video speed class. Use it in a UHS-II or UHS-I camera for high resolution video, fast burst rates, and for a fast overall workflow.