A lot of divers find setting up a sidemount<\/a> harness to be confusing, even those with experience configuring a backmount harness. As a technical sidemount instructor<\/a> with nearly two decades of experience, I thought I could help. So, here is my ultimate guide to setting up, sizing, and configuring your sidemount harness.<\/p>\n\n\n\n This article deals with Mexican-style sidemount harness designs<\/a>; as these are the ones that require the most knowledge and procedure to get right. These types of harnesses can be seen on many of the most popular sidemount systems, like the Razor 2.0, XDeep Stealth<\/a>, Apeks-WSX, Diamond, Deco Sidemount<\/a>, and many more. You can even build your own harness quite cheaply and easily using my instructions below:<\/p>\n\n\n\n What components are needed to build a DIY sidemount harness?<\/a><\/strong><\/p>\n\n\n\n I’ve tried to keep this article quite ‘generic’, as there are specific details and differences on most ‘off-the-shelf’ sidemount harness systems. Think of it primarily in terms of key guiding principles for configuration.<\/p>\n\n\n\n I’ve also made all of my illustrations without showing the sidemount wing attached as it aids clarity. When putting together your sidemount system, obviously you’d need to attach the sidemount wing at an appropriate stage in the process.<\/p>\n\n\n\n If you are assembling a harness for the Deco Sidemount<\/a> wing, read these specific instructions:<\/p>\n\n\n\n