While this sheet is soft, organic, and does the job of covering the bottom of the crib with a nice fit; the sheet is very thin and unless your kid is not going to spit up/have a diaper leak/or spill in the crib than this does not protect the crib bottom. Upon ordering I thought I needed the waterproof and the sheet set, turns out the waterproof sheet has the same fabric covering over the plastic part so it is not necessary to have two sheets. I'd recommend skipping the sheet and just getting the waterproof one (or splurge for two so you have one handy when the other needs to be washed).