[Scott E. Bonds]

I get the construction type from work. I use 1 size larger than my riding coat. On the highway mine tends to get wind under it and it pulls it up around my neck. So, I use a safety pin and pin the lower front of the Hi-Viz to my britches to keep it from flying over my helmet.

Last winter I splurged and bought a Hi-Viz riding coat...much better choice IMO. I use the vest when its hot over a shirt.

 

[PTRider]

The Class 3 vests have short sleeves with the hi-viz and reflective tape visible on the sleeves, even better for being seen. Some of the ordinary Class 2 vests get hidden behind luggage, windscreen, etc.

 

[LordSmoke]

The Class 3 vests have short sleeves ...

wouldn't that make it a shirt?

 

[Attackturtle]

I bought this
HI VIZ MOTORCYCLE VEST Zip-N-Rip (Jumbo size XXL-XXXL) | eBay

I wear and XL Jacket and I think the vest was XL too. This seller is very mc friendly so if you go with this version, Im sure he can advise you.

 

[PTRider]

I'd call it a shirt, but I'm not writing the regs and selling to those who gott'a follow the regs.

I just ran across a source for the BEST vests:
Hit-Air Vests
Protection for the neck, spine, tailbone, sides & front of the torso.