The club says sales of the shirt almost doubled after it was worn by Fontaines D.C frontman Grian Chatten.
The Reading Repairium was on hand to fix anything and everything, from boots to dinosaur suits.
Hundreds of tents were left at the Richfield Avenue site in Reading following the weekend's fun.
The festival runs from Thursday 27 August to Sunday 30 August at Richfield Avenue.
Solo festivalgoer Tilly Davies talks about feeling safe, making friends and having "a great time".
The British singer and Irish rock band Fontaines DC both headlined the first night of Reading for 2026.
About 100,000 people are expected to attend Reading Festival over the weekend.
BBC Newsbeat has spoken with festival-goers to see whether they feel the changes will attract a wider demographic.
Workers found everything from wet wipes and clothing to tents and camping chairs in the toilets .
