Dome racing swim caps are specialized swim caps that are designed for competitive swimmers. These caps are typically made from a smooth, hydrodynamic material such as silicone or latex, which helps to reduce drag and improve the swimmer's speed in the water.

The term "dome" refers to the shape of the cap, which is designed to fit snugly over the swimmer's head and cover the ears. This shape helps to reduce drag and improve hydrodynamics, which can be crucial in competitive swimming events where every fraction of a second counts.

Dome racing swim caps are available in a variety of colors and designs. They are sometimes available in different sizes to accommodate different head shapes and sizes.

Dome racing swim caps are an essential piece of equipment for competitive swimmers who are looking to improve their performance in the water.