Deku t-shirts are made from a mix of fabrics: many are 100% cotton, some use a 60% cotton / 40% polyester blend, and heather grey options are often 65% polyester / 35% cotton. Listings also reference fabric names like Microplush and Knit.
Care guidance consistently recommends machine washing with like colors, washing cold when specified, and tumble drying low. Avoid bleaching and do not iron over printed designs.
Some listings note the shirts are officially licensed, and several entries list an industry certification labeled Fair Trade Certified.
Descriptions reference named fabrics such as Microplush and Knit and mention the fabric weight/type described as “Year Round Fabric Construction.”
These tees are described as relaxed, breathable, and lightweight with a standard/regular fit—intended for comfortable casual, everyday wear.