V-Neck or Round-Neck Undershirt? UK Fit Guide

V-neck or round-neck undershirt?

The best neckline depends on the outer layer you wear most often. Both the men’s V-neck and round-neck use the same video-confirmed oversized underarm guard geometry; the difference is simply how the neckline sits beneath your shirt.

Choose a V-neck for open collars

A V-neck is the more discreet choice under an unbuttoned work shirt, a casual overshirt or any layer where you do not want a crew neckline to show. The white V-neck keeps the fine open-grid mesh body and sleeves, alongside its opaque tonal-white underarm guard.

Choose a round neck for a classic crew line

A round neck works well under knitwear, high-necked shirts and polo layers. It provides the same shield-shaped guard, raised perimeter stitch and straight side seam as the V-neck.

Keep the decision simple

Choose the neckline that suits your outer shirts, then choose a single, three-pack or five-pack V-neck rotation where appropriate. White is the launch colour.

Shop the men’s V-neck or view the men’s round neck.