Would you spend £25 ($39) on a t-shirt that’s guaranteed to last until 2045? British designer Tom Cridland’s 30-year t-shirt Indiegogo campaign promises just that. Cridland, who has designed clothing for celebrities like Leonardo DiCaprio, Hugh Grant, and Daniel Craig, first caught our attention he launched his first “30-year” project earlier this year in a sweatshirt Kickstarter that successfully reached its crowdfunding goal. Now Cridland’s back again with a high-quality t-shirt that he says won’t show any signs of wear or tear until 2045—and if it does, the company will replace or mend the sweatshirt for free. Read on to learn what goes into making a t-shirt with a 30-year guarantee.