Flying magic boots

It's simple. I chose leather because it doesn't have many uses

2 Lapis lazuli + 1 leather boots + 2 feathers = You can walk on air 5 blocks from a scaffolding for to build on survival mode more easily

2 Lapis lazuli + 1 leather boots + 2 slime = You can jump and fall 5 blocks on air without receive damage

2 Lapis lazuli + 1 leather boots + 2 redstone dust = You can run very fast