Dolphin shorts or Dolfins are a specific style of unisex shorts worn for athletics. They are typically very short and were originally made from nylon with contrasting binding, side slits, and rounded corners, with a waistband at the top—a style popular in the 1980s.

Feelin’ Groovy: 31 Fascinating Vintage Color Pictures of High School Fashion Across America in 1969 _ Nostalgic US Treasures