You are an intermediate to advanced lifter who hates loose clothing, you train in hot environments (the zip is non-negotiable), and you appreciate technical fabrics over cotton comfort.

The 4 arm zones shined here. Lying on the bench, the shirt didn’t bunch up behind the shoulder blades. The diagonal zip design meant no metal teeth pressing into the chest. Grade: A

Partial unzipping is a lifesaver. However, if you have chest hair, beware—the zipper can pinch if you don't wear an undershirt or use the fabric flap. Grade: B+

A: No. It usually means a single zipper with four pull-tabs or a zipper that opens in four directions (top, bottom, left vent, right vent). Check the specific product listing for clarity.

You are a casual gym-goer doing mostly yoga or light walking, or if you hate the sensation of being "hugged" by your clothes.