According to the Carburetor Seat standard

According to the Carburetor Seat standard abrasion test, normal jeans last 0.6 seconds, while protective motorcycle pants will last 5 seconds or more.

Think about 5 seconds of protection versus about 0.5 seconds. If you have to think very hard, you have been riding your motorcycle without a helmet again. Go with the Kevlar protected, re-enforced jeans.

You apply the same principles to jackets. You are looking for hard wearing jackets, preferably thick leather not the fancy thin fashion leather like some jackets.

 Pay attention to the stitching which should be uniform with no dropped stitches. All your stress areas, your elbows and shoulders should be reinforced, ideally with some impact protection included.

 This means, not a bad ideal to have some protective padding in your jacket.

Want to keep those fingers looking good and attached? You must have a decent pair of gloves.

 When you fall, you instinctively put out your hands palm side down to stop yourself in a slide, so the palms of your gloves should made of thick leather or knitted Kevlar and reinforced with patches. Knitted Kevlar is especially good for this kind of abrasion resistance, but reinforced leather works well too.

That old saying it only hurt when I stop. Well, apply that saying to when you hit the pavement. Impact protection can be bought separately like back protectors.

 If you buy it, make sure you wear it.

Depending on your personality, it might be best motorcycle protective clothing with a degree of impact protection included so that you know when you put on your jacket and pants, the protection is there and you don't have to remember to put it  Carburetor Needle on.