PROMASTER RUGGED MEMORY CARDS are designed to keep your memories safe! Their world-proof design is the result of a uniqu manufacturing process making the cards up to 3 times stronger than other products. Industrial grade components offer maximum protection against water, high humidity, extreme heat and cold, as well 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.