What Should You Wear Under a Dress Shirt for a Cleaner Line?

For a cleaner line under a dress shirt, wear a seamless, close-fitting base layer in a neutral or matching tone — the Short Sleeve Layer's raglan shoulder construction eliminates the seam ridges that cause visible lines under fitted dress shirts.

The cleanest line under a dress shirt isn't about wearing nothing — it's about wearing the right thing. A standard cotton undershirt bunches, shows through lighter fabrics, and often creates a visible seam line right at the shoulder, exactly where a well-fitted dress shirt is most snug.

What actually creates a clean line

• Seamless construction, particularly at the shoulder, where standard T-shirt seams are most visible.
• A close, compression fit rather than a loose one — loose fabric bunches and creates its own visible lines.
• A matte, thin fabric that doesn't add bulk or catch light differently than the shirt itself.

The added benefit

A compression base layer gives the same clean line as a well-fitted undershirt, plus the posture and support benefit a plain undershirt never offered. It's not an either-or choice between looking sharp and feeling supported — the right base layer does both at once.

Shop the Short Sleeve Layer

Your choice. Hidden impact.