Hi,

I'm currently buying my (first) protective gear and need some advice. Most of the time, I'll be riding to work and go on tours once or twice a year.
For me, I'm male, 170cm (~5,6"), muscular build, 79kg. Most of the time a size M fits me well.

So far I've got the helmet and I'm looking for the following items for my day-to-day drivng next:
- Gloves (not extending above the wrist)
- City boots/sneakers (ankle high, reinforced toebox, ideally w/ zipper on the side)
- Back protector (standalone w/ straps, so I can wear it under different pieces of clothing)
- Jacket

I'd like to buy used where I can (helmet is new though), but especially with the back protector I'm not sure whether I shouldn't spend the money on a new one or not.
For back protectors I've tried the Dainese Wave Air and liked the ventilation and how light it felt, but due to my height I'm right on the border between two sizes and I've read wearing the wrong size back protector can be really dangerous. Haven't tried any alpinestars etc. yet.

Any input is welcome.