My favorite bits are the enclosure details on the back. More jeans top stitching, and reinforcing rivets on both edges of the zipper opening.
The zipper is No. 5 (standard jeans size) antique brass with a chain pull. I considered going with a jeans locking pull for the zipper but I decided the locking would be annoying.
The cushion is lined with upcycled yarn-dyed cotton sheeting and bound with cotton chambray