Short answer, we like to think of ourselves as the Trader Joes of cloth diapers. If you're not familiar with Trader Joes- they are a grocery store chain that has 1 of each type of product that is the best in its category, sold at a good price. That way, you the customer don't have to waste time thinking which specific brand you want.
For a longer answer, here is our CEO (Chief Everything Officer) giving a little history of what we did in the past that lead to what we do now. Note: this video is a little dated, as all our cloth diapers now come standard with our best insert yet - the Tank.
Nowadays, all of our cloth diapers comes standard with our new and improved Tank Insert - again, because we want to offer the best option as our standard for you. But you can still purchase Charcoal and Bamboo Inserts separately.