Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Is it waterproof?
Document: I've had this bag now for about a month. I commute by train and needed something that was protective, stylish, wasn't too heavy, and didn't tempt me to fill it up with too much junk. This works for all reasons. It's not heavy duty, may or may not be waterproof and has only medium duty shoulder straps, but it does hold a laptop, slim binder, power source, pens, glasses, gloves, etc. And it's cheap.
Just loved the video a previous reviewer did on this. It is a great purchase. I use it for taking earphones, chords, laptop for a weekend radio gig. There isnt a lot of space for a book or two maybe after the laptop, but that makes the backpack slim, lightweight and a great arms free way to go about with your computer. ITs waterproof and lots of inside places to tuck things, but I actually don't use those.
Comfort: both the original slim and the energy backpack have well padded straps that are very comfortable. The straps are straight and initially kind of tough, but that goes away real quick with a couple of uses.4. Material: both backpacks are very well padded on all sides and does a great job of protecting the laptop. I have a Macbook Pro and it fits perfectly in the compartment without moving around. The Energy backpack claims to be waterproof, as I've said before, but that's only somewhat true.
I used the Belkin Energy Slim backpack for most of college. I bought the original Belkin Slim (this one) recently since my energy backpack has seen too much use. I figure I'll compare the two a bit.1. Appearance: this backpack looks a bit better than the energy counter part. The material feels sturdier and more sleek. The energy backpack claims to be waterproof, which isn't 100% true, and the "water proof" material doesn't look as good as this one.
you can't put a purse or lunch bag in it, which i didn't want to do, so if you want a backpack to put all your stuff in this probably isn't what you want. i've used this for a few weeks now and i'm happy to report that my headaches are gone and it seems much lighter than my old messenger bag setup.
what i have in my backpack-mac book pro 13 inch and cords-3 notebooks-i pod-wallet-pencils-western digital hard drive-and some flash drivesthat's pretty much all that fits but that's all i really need and i love it
very thin and compact. Love it! Great seller and fast shipping! will by from again
very sturdy feel. Would high recommend it! !
very smooth, handle well on your back. not heavy. I'll recommend to a friend or family members. well do. a+
use to commute to city a couple of times a week--lightweight, streamlined, modern look... actually makes laptop feel lighter. packs what I need... laptop, magazines or book, id, pen, glasses, etc  perfect
Answer: yes