Prevent water from entering the nose: The main function of the swimming nose clip is to clamp the nostrils and effectively prevent water from entering the nasal cavity during swimming. This is especially important for beginners or those whose noses are prone to water, which can avoid choking or discomfort caused by water flowing into the nasal cavity.

Improve swimming efficiency: The use of nose clips can make swimmers concentrate more on using other parts of the body to push themselves forward while swimming, without being distracted to control the breathing of the nose. This helps swimmers to make more efficient use of each stroke and kick, thus improving swimming speed.