Here's the deal, and it's a risk vs rewards type deal, and I'm not the first in the thread to allude to it. I see guys riding in shorts and flip flops all the way up to full leathers and all in between. I sometimes opt for kevlar lined jeans, and a Joe Rocket jacket, but more often use one or the other set of my full riding gear...I have a couple of brands, one is mesh, one is not. I know the less gear I wear, the more risk I take. I have a set of leathers I bought for the track. I considered using just my best street gear, as it was "acceptable" with the organization I started track days with, but chose leathers instead. Glad I did...I made use of them and the new helmet my first day on the track. Went down (similar to the guy in the video)...lost the front end in an off camber hairpin. I probably got on the gas too soon...my fault for sure...novice to the track. Luckily it wasn't a faster crash...maybe about 45 when I went down. slammed my head in the pavement, and slid quite a ways across the tarmac, then rolled a bit too as the leathers got "traction". Rang my bell a little...but not badly...and not a scratch or even a 'hot spot' under the leathers...my only pain was in my ribs on the side that hit the tarmac for the next 3 weeks...I'm old, so it took a while. It was soreness...BUT I got up back on the bike, and rode it off the track, and didn't even miss a session that weekend. All my gear worked. I'm not sure the result would have been as painless, or as lacking in injury had I not had on full leathers. Yes, it was on the track, and I didn't impact anything other than the tarmac. The street is different...BUT you can protect against blunt force trauma...more than not at all with chest and back protectors, and of course a good helmet. I retired that brand new helmet after that track day...it hit hard enough to gouge the outer shell. If you get hit by a car, or hit a hard object...chances are...you'll get hurt, but you up your survival the more gear you wear. And yes, the more gear you wear, the more it impacts your basic riding enjoyment. So...weigh your options and risks...go ride and be safe.