NWT Keep the Heat Thermal LS Colorblock long sleeve sz 8 Mostly dark teal with blue and purple color blocking Sold out online Description on website: Stay out longer. Made from high-performance wool-blend fabric, this layer helps regulate your temperature so you keep warm during intense cold-weather activities. I usually wear an 8 in Lulu long sleeve tops and found this to be true to size. also an 8 in align tanks for reference.