These are the unusual, colorful slides that mattress startup Casper is using to convince IPO investors that it can capitalize on the $432 billion sleep economy

Buzzy mattress startup Casper has repeatedly pushed the idea that sleep is more important than any other single activity in a person’s life.
That belief is on full display in its S-1 prospectus — the document Casper filed on Friday ahead of a planned IPO lat… [+971 chars]