Lululemon Men's short sleeve T shirt blue chambray look M EUC

This is a lounge wear casual fashion shirt not performance athletic. Hard to describe the material so look at close ups. It's a knit fabric like typical T shirt, but looks chambray like denim. Very cool! No size tag but it's a M: Shoulders 18" Armpits 21" Sleeves 8" Length at back 27.5" No flaws and no signs of wear!