>>351735>>351737All the gear, and get the right gear.
Dualsport's an interesting conundrum when it comes to equipment:
On the street, you're interested in abrasion resistance. You don't fall far vertically (bike to ground), but the forward momentum you carry as you slide on the asphalt's what grinds your skin off.
Off-road, it's the impact with rocks, stumps, trees, or getting tangled up with your bike that causes pain. Impact-resistant padding/armor is more important, since you're generally not sliding for very long in the dirt.
I've found that offroad gear works better on the street than street gear does offroad.
Street gear also sucks off-road because it generally depends on airflow to keep you cool. Speeds are much lower in the dirt, and you'll roast in gear that isn't designed for low-speed ventilation.
I have a few sets of gear, then pick/choose what I wear based on the riding i'm doing, the weather/riding conditions, and what I feel like wearing.
If your riding focus is offroad, spend the money on offroad riding gear. Dirt/MX helmet, goggles or sunglasses, chest/shoulder protection, elbow pads and armored shorts are nice sometimes (I like paintball elbow pads, my shorts are for snocross), good knee protection and good riding boots.
Boots are a lot more important than people give them credit for.