You can get this in XS to 4XL and wear it loose or fitted.
Item Tag: Base Layer
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IRON FIST ATHLETIC STAMINA BASE LAYER SS TOP
Multiple sizes are available, so you can find your perfect fit easily.
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Omni Wool Men’s Black Base Layer Zip Long Sleeve Top Shirt Thermal Size Lrg NIB
You will find the crew neck is just loose enough to let air circulate well.