The bourbon cask-aged Rye IPA comes in at 6.2% and is hopped with Pilgrim, Chinook, Galaxy & Simcoe.
Champion malts used in the brew, which is limited to 800 bottles, include Maris Otter, Rye, Crystal Rye and Cara.
Purity managing director Paul Halsey, explained: “X is really special for us as it marks a massive milestone for the company, having reached ten fantastic years and still growing.
“That is why we are dedicating it to all of the people who have supported us over the years and helped to make us who we are today.
“We love presenting X in a 750ml bottle as it gives a real sense of celebration when you pop the cork on a fine barrel aged beer.
“We were delighted by how well last year’s limited edition beer Gnarly sold and the feedback we received.”
The brewery’s 10th year marks the latest stage in the company’s journey, which has seen the firm broaden its cask and keg offering, as well as into cans.
Halsey added: “A major part of our development over the last ten years has focused on how to achieve absolute consistency and pure quality, and X is a great way of showcasing the skill of our brew team.
“It’s a stunning beer for our fans and a real testament to the quality coming out of our brew house. It shows just how far we have come as a brewery and how far we want to keep on pushing, not only our own beers but the beer market too.”
