What sort of bedding should i put in the nesting box for my rabbit?

Install a small mesh wire floor for the droppings to fall through ,sometimes the urine will build up in the corner. Rabbits will eat their droppings, this is a normal part of their biological habits to re-digest their droppings(I read it in a book), for nutrition and they will do this in their box. I would have a box filled with pine shavings(Cedar is toxic if splinters get in their mouth if chewed) for comfort and a place to feel safe. To make a bed for the young, the Doe will pull the hair from her chin to make a soft, furry warm nest for the babies.We lived in Wenatchee and our Rabbits were outside all year round.