centers on lightweight, breathable fabrics like linen and cotton and relaxed silhouettes. The 2020s in fashion wiki entry notes current trends like “Eclectic Grandpa” and vintage Americana, highlighting a mix of relaxed, preppy, and gender-fluid styles. 

Wikipedia +5

Historically, casual summer suits—such as the 1930s “Leisure Suit”—paved the way for modern warm-weather aesthetics, moving away from restrictive layers. 

Wikipedia +2