Here is a link to the 1/2 helmet I wear

https://www.daytonahelmets.com/d.o.t...ey-carbon-fibe
https://www.daytonahelmets.com/ear-w...ull-cap-styles

When I did my research many years ago, this helmet was the lightest weight DOT 1/2 helmet on the market, as far as heat on the head is concerned, it is better than any DOT 3/4 or full helmet I have come across but far from ideal

What does a 1/4 helmet look like? I have never heard of one