Living Larg Lars

I stay cooler in this shirt than any other I have worn. The slightest bit of air movement goes through the fabric, better than wearing nothing. Then with any over layer the shirts provides reasonable insulation for its light weight. The material snags and pulls very easily so don't expect it to keep looking new if you wear it alone and get any where near vegetation. This doesn't bother me so I gave it 5 of 5 for functionality.