Oh, be still our beating hearts. When two of our favorite brands collaborate on a new creation, you can assume that the result is something truly covetable. In this case, we're talking about J.Crew's new Aden + Anais for Crewcuts swaddle blankets [1] ($37 per set).

You already know about Aden + Anais's ultrapopular muslin blankets. Made of 100 percent cotton, the stretchy, breathable wraps are a favorite of moms around the world (Prince George was wrapped in one when he left the hospital) not only because they maintain warmth without overheating a newborn, but they're also large enough to provide a good swaddle and they come in adorable yet not-too-cutesy designs.

And now, they come in even more stylish designs thanks to J.Crew Creative Director Jenna Lyons. A mom herself, Lyons worked with Aden + Anais to create four exclusive styles — a hot-pink and aqua set featuring hearts and birds, and a blue and yellow set covered in cuddly monsters, moons, and stars — that will only be sold at J.Crew stores. The collaboration also includes muslin burpy bibs [2] ($30 for two) in the same patterns to keep Mom stylish when she's forcing a burp out of her little one.

Read on to see all of the designs in the collection, which is available now!