Recipes and more info can be found here.
Get that pesky water out of your eyes and see better with these Goggles.
Store oxygen for use with your SCUBA Breather with this nifty tank.
Use oxygen from your SCUBA Tank allowing you to breathe for extended lengths of time underwater.
The lay-minecrafter's alternative to the SCUBA gear, breathe infinitely underwater when your head is up to 2 meters below the surface of the water.