Apple sells only one MacBook sleeve in its online store: the leather-free Bellroy Caddy for Mac Laptops, which is available in two sizes for 13-14-inch MacBooks and the 15- and 16-inch MacBooks.
Whether you want a soft shell or full protection, I've compared and reviewed the best laptop backpack, laptop bag, sleeves and cases ... fitting laptops up to 17.3in, and the padding here is ...