noun
rash guard; rash vest; rashie
A tight-fitting athletic shirt worn for water sports to protect against sunburn, chafing, and minor abrasions. Common in surfing, swimming, and beach settings.
海に行くときはラッシュガードを着て日焼けを防いでいる。
When I go to the beach, I wear a rash guard to prevent sunburn.
子供用のラッシュガードは
Children's rash guards often come in colorful designs.