I highly recommend a breathable bumper, a lot of moms don't even know about these hidden treasures! I've heard so many conflicting comments about bumpers and SIDS. I was very against getting one but my hubby really wanted the cute sports bumper so I gave in and spent $200 on the set. We used it for 1 month (and for that month Tyler didn't even sleep in his crib.) I'm such a worry wart about SIDS so I took that bumper out and put the breathable bumper in, 8 months later we're still using it!
They come in different colors too!