The Katana 2 is simply the perfectionist harness when it comes to sidemount diving - the 5th historical Installment in the HOLLIS sidemount range - Your only compariatable choice should be the XDeep. Both harnesses are exceptional in quality and functionality. The Katana 2 boasts a robust and streamlined design, has plenty of lift and has been designed for use with the  KISS Sidekick and Sidewinder CCR as a perferred harness. It also looks insanely cool. Tried and tested in the most intense cave diving conditions - you cannot go wrong with this one size fits all masterpiece.