deck shoe

A deck shoe is a casual leather or canvas shoe with a rubber sole designed for grip on wet surfaces, originally worn for sailing and boating.

The sole typically features a distinctive siping pattern—small cuts that channel water away—to prevent slipping on boat decks.

Deck shoes usually have leather laces threaded through the sides and around the heel.

Though still popular with sailors, they've become general casual footwear, especially in preppy fashion.

He wore deck shoes without socks all summer.