Go to Campmor.com and do a brand search on Duofold. They have some really good deals on Coolmax and Hydroduct tshirts and stuff. Hydroduct is almost the same as Coolmax. Very good wicking. My every day under-jersey shirts are Duofold Hydroduct. Varitherm and Thermax are also similar fabrics just generally slightly heavier weights and more for cooler weather layers, generally long sleeves and tights.