I use the Under Armour Iso-Chill Brush Line Long Sleeve Shirt for men as a base layer especially for spring turkey hunting season when the temperatures could reach the 50's or 60's. The shirt if fast drying and provides 50+ UPF sun protection. I'm 6'3" and the sleeve length on the XL fit me perfectly. UA offers two camo patterns: Barren and Forest AS (shown below). At $45.00, these are a bargain.