Sony’s latest SD cards are the fastest ever created, according to the company. The SF-G UHS-II SD card features read / write speeds of 300MB/s and 299 MB/s, respectively, making it the fastest SD card announced to date.

The SF-G cards are shock proof, waterproof, temperature resistant, and X-ray proof, according to Sony, and will be available in 32GB, 64GB, and 128GB variations. Sony hasn’t released any pricing information on the SD cards, but says the SF-G cards will be available sometime in March from the usual lineup of retailers.