hivis - что это?

[mist]

Пожалуйста, помогите перевести.

Слово встречается в следующем контексте:

Job Description: Site labourers required for sites in Bury St Edmunds, Suffolk.Must have previous experience on building sites. Must have own hard hat, boots and hivis. Own transport and CSCS Health and Safety card would be an advantage.
£20-30k

Заранее спасибо

[Aiduza]

high visibility:
http://en.wikipedia.org/wiki/High_visibility_jacket

[Translucid Mushroom]

HI-VIS

Yellow reflective vest, popular with roadworkers, fork lift truck drivers, ravers and residents of Tamworth.

[mist]

спсб