Subway Scientist Pre-Roll is made with a high potency THC strain from RIFF – a recreational cannabis line by Aphria. Released in 2018, this strain is Aphria’s version of Grand-daddy Purple. Their product ranges from 17 to 27% THC and less than 1% CBD, making it appropriate for moderate to advanced users, depending on the batch. Unlike traditional flower, this product comes pre-rolled into separate joints. This makes it highly convenient for smokers looking to avoid the hassle of rolling their own. Users report a grape, berry, sweet flavour.