This Columbia Sportswear Insight Ice Crew Shirt drops from $29.99 to $19.47 at Sierra Trading Post when you use coupon code EB061813B in the cart. This is the lowest price we found by $10. This shirt has Columbia's Omni-Freeze advanced cooling technology that is supposed to keep you cooler in hot weather and it has UPF 15 sun protection. It's available in most men's sizes in white (pictured) and varying sizes in metal, neon green and compass blue. There is no sales tax in most states.