He sported a collarless jacket.

他穿着一件无领夹克。

youdao

A short, sleeveless, collarless garment worn especially over a shirt and often under a suit jacket; a vest.

马甲一种 短的无袖无领衣服，尤其是穿在衬衫外面 夹克装里面的；

youdao

Men wear a collarless short Chinese jacket, long trousers and white or blue headpiece.

男子穿无领短衫、长裤，大多用白布或蓝布包头。

youdao

He spent his summers in Rangoon from the age of 10 and wears a traditional sarong-like longyi and a collarless jacket over a white collarless shirt.

WSJ: Saving Myanmar's Priceless Architecture

The ceremony followed this lead, featuring traditional Chinese drum music and Mickey Mouse dressed in a traditional, red Tang Chinese suit -- a collarless silk jacket with matching trousers, resplendent with gold accents on the embroidered jacket, toggle buttoning and trouser cuffs.

BBC: Different Disneylands around the world

One wore a dark baseball cap, a light collarless shirt and a dark-colored jacket.

CNN: SHARE THIS