Technology goes with the T-shirt! And what do you get? Very comfortable, elastic, cool and light jersey. It's made from a soft and lightweight stretch polyester blend that promotes airflow to keep you cool and dry all day no matter what you're doing! It is made of 77% nylon, 23% polyester. It's super easy to care for, just wash and dry and it's ready to wear the next day! Fits great, feels great and stretches great. Ideal for training, hiking, running and everyday activities. Great shirt!