Yes, some of them. 15 of the 16 Nike AIR MAX 270 colourways we checked contain no animal materials and are confirmed by both the materials list and the product description, plus 1 more that looks clean but publishes no description to cross-check. 0 contain leather, suede or another animal material.
Confirmed animal-free (15)
Clean in both the material label and the product description.
The material label is clean, but no product description is published, so a minority material such as a suede overlay cannot be ruled out. Check the photos.