Riderss must wear a full face helmet (either fixed or detachable) at all times during the race including liaison stages on the bike.

车手在比赛期间必须佩戴全盔(固定式和可拆分式)，包括骑车通过的转移路段在内。

youdao

We specialized in making tool case and helmet, such as ATV helmet, cross helmet, street helmet, full face helmet, half helmet, open face helmet, kids helmet.

我公司专业生产摩托车头盔和后尾箱，比如，越野盔，全盔，半盔，夏盔，儿童头盔。

youdao

We had two six-wheeler trucks, too, but it was warmer in the buggy: you have an extra layer of clothing and a full-face helmet.

我们还有两辆六轮卡车，但是在冰车里更暖和：你可以多穿层衣服戴封闭式头盔。

youdao

We had two six-wheeler trucks, too, but it was warmer in the buggy: you have an extra layer of clothing and a full-face helmet.

BBC: Polar express

This time, I cinched up my full-face motorcycle helmet, uttered a colorful Saxon oath and pushed off.

WSJ: Snolo Stealth-X Review: A Pricey Way to Zip Down Your Private Mountain | Rumble Seat by Dan Neil