Hard to find cotton graphic tees but these fit the bill!
"Love the patterns on Hatley’s boy tshirts, usually everywhere else sells a poly blend so was happy to find 100% cotton ones that are still fun and stylish."

Overall rating: 4.825397 / 5 from 63 reviews.
The Boys Sweet Beats Raglan T-Shirt is praised for its excellent fit, superior fabric, great quality, and appealing design, making it a popular choice for active days and playdates.
Review topics: ["fit","fabric","material","colours","design","quality","looks","shirt","sleeves","suit","cotton","kids","picture"].
"Love the patterns on Hatley’s boy tshirts, usually everywhere else sells a poly blend so was happy to find 100% cotton ones that are still fun and stylish."
"Great quality cotton t-shirt. Soft with fun design. Grandson loves it. Comfortable raglan sleeves! Perfect fit."
"Love the look of the raglan sleeves. Good quality T-shirt. Fabric is so soft and washes well."
"Cute design. Great quality cotton. Fit true to size."
"Couleur intéressante pour garçons"
"I like the images and that it is very light and cool! not one of those polyester ones and are short sleeve but make the kid hot. however it is a bit small. I bought size 6 for my five year old."
"Love all the fishing shirts hatley has"
"Cute shirt!"
"Grandson said his best friend wanted a t-shirt like this."
"S’agence admirablement bien avec le short bleu turquoise"