Intro: Seat/Chair Cushion Made From USPS Priority Mail Padded Flat Rate Envelopes
Long hours in a hard chair can be brutal on your back. Here's a simple way to fix the problem:
All you need is some Padded Flat Rate Envelopes, the kind you can get for free at the post office, and some tape. Just stack some of the padded envelopes on a chair and tape them down so they can't go anywhere.
That's it! That's all there is to it!