Bay undershirts are crafted with a 60/40 cotton–poly blend for softness, breathability, and stretch. The fabric is lightweight but durable, designed to layer smoothly under shirts or sweaters without adding bulk, or to wear solo when you want a clean, fitted look.

They’re slightly slimmer and shorter than our Premium T-Shirts, designed to stay tucked in and invisible under layers. The ribbed collar and reinforced seams keep their structure over time, while the body fit follows natural movement without being tight.

Absolutely. Many customers wear them as minimal everyday shirts. The smooth finish and modern silhouette look sharp on their own with denim or chinos, especially the black undershirt for a clean, effortless look.

No. Each undershirt is pre-shrunk and tested for shape retention. Just machine wash cold and tumble dry low. The cotton-poly blend keeps its form and softness through dozens of washes.

Yes. The lightweight cotton jersey fabric wicks moisture and allows airflow, making it ideal for layering in summer or wearing under sweaters in colder months without overheating.

White is best for wearing under light-colored shirts or classic layering, while black is perfect for darker outfits, low-light tones, or standalone wear. Many customers grab both for a balanced wardrobe rotation.

We offer sizes from S to XXL, with a true-to-size fit. If you’re between sizes, choose your regular size for a fitted look or size up slightly for a looser layer. Each product page includes detailed measurements for accuracy.

The undershirts are lighter and smoother, designed for layering and comfort. The Premium T-Shirts are heavier, more structured, and styled for standalone wear. Many customers layer both, a white undershirt under a vintage-fit tee, for a sharp, classic look.