Today I was on campus, and the weather said the storm wouldn't hit until after 5. Well 3'oclock rolls around and it starts raining, and me without an umbrella. Well, I walked back to my car and it starts pouring, luckily I had my powerbook in my Timbuk2 bag. Its waterproof layer saved my powerbook. If you own a powerbook, and do not own a water resistant bag I seriously recommend looking into getting one. Mine really saved my powerbook today.