Ga waɗanda suke jin daɗin wasanni na ruwa kamar hawan igiyar ruwa, ruwa ko ninkaya, rigar rigar kayan aiki ce mai mahimmanci. Wadannan tufafin kariya na musamman an yi su ne don sanya jiki dumi a cikin ruwan sanyi, ba da kariya ga rana da kariya ta yanayi, da samar da buoyanc ...
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