pack and play mat hard as a rock

Amy • Married💏 proud mommy to a bright baby girl 😍
So this is more of a suggestion. I have a pack and play. And it has the newborn part, so the may is higher up. 
I was thinking of having my baby sleep in the pack and play in our room soon since she seems to be getting big for the bassinet. 
She will nap in the pack and play but I feel like the mat is soooo hard. Any suggestions? I know they need a firm surface, but danggg it's super hard.