Cotton Babies One-Size Microfiber inserts are made of 3 layers of the thickest microfiber terry available anywhere. Our unique snap down design allows these inserts fit perfectly in a small, medium or large Happy Heiny's or at any rise setting on a bumGenius! Our new, wider and longer design fills up Wonderoos and Happy Heiny's side-to-side and end-to-end. No more leaks!

Drying time:
Our one-size inserts dry as quickly as Wonderoos or Happy Heiny'sdry on the line or in a dryer. All the economics of a one-size product and no more waiting for thick cotton or hemp inserts!!

Absorbency:
Our inserts are now manufacturer rated at 15 oz. aborbency. No other microfiber insert compares. We recommend using two inserts when diapering an older baby or toddler at night.

Washing:
You only need a tiny bit of detergent to get these inserts clean.

Economy:
Less detergent, less energy (our inserts are easy to hand wash/line dry if necessary), convenient one size design, and a lower price make these inserts the absolute best value available anywhere.