Best Men's Cardigan Sweaters AI pick

Uniqlo: Fine merino and cashmere cardigans.
Polo Ralph Lauren: Shawl-collar and cotton cardigans.
John Smedley: Premium fine-gauge cardigans.

Chosen by an AI model from its trained knowledge, with its reasoning.

AI pick (line): Uniqlo Extra Fine Merino V-Neck Cardigan

A thin, washable merino cardigan that works as a blazer substitute over a shirt and stays flat under a coat.

Not for: Anyone looking for a chunky shawl-collar cardigan to wear as outerwear.

Button placket: The placket should be reinforced with tape and have real horn or corozo-style buttons that are firmly sewn. An unreinforced placket sags and gapes once the cardigan is buttoned regularly.
Weight for use: Fine gauge for indoor layering. Heavy or shawl-collar for wearing as a light jacket. The two jobs need very different knits.
Length: The hem should end around the belt line, not mid-hip. Long cardigans look sloppy when unbuttoned and bunch under coats.
Fiber: Choose wool, merino or cashmere over acrylic blends. Cardigans are worn open and rubbed at the elbows, so pilling shows quickly.