Casper just unveiled its first new mattress since its 2014 launch - here's what it's like

In 2014, Casper introduced its first product: A memory-foam mattress that customers could buy online and have shipped directly to their homes.

The product spawned $100 million in sales its first year, attracted the attention of high-profile investors like Leonardo DiCaprio and Adam Levine, and inspired copycat startups trying to tap into the direct-to-consumer mattress trend.

Now, three years later, Casper has built its first new mattress since its launch: the Casper Wave.

The new mattress is the work of months of research on the part of Casper's product team, led by cofounder and chief product officer Jeff Chapin. The Wave features better ergonomics, newer technology - and a higher price.

Here's what it's like.