Our Pima T-Shirts utilize American grown cotton knit in Los Angeles into a luxuriously soft, yet durable 160GSM jersey. The material is then cut and sewn in San Francisco, CA in the same factory where our jeans are made. Once cut and sewn, they are sent to a local dye house in Los Angeles to be dyed to limited-edition colors. Due to the dyeing process, these tees have a softer, more broken-in hand than our standard tees and will not shrink further. Please check the measurement chart and size accordingly.