A full-body harness is a critical piece of personal fall protection equipment. However, even the best harness will not protect you if it is not fitted correctly. An improperly adjusted harness can cause severe injury during a fall or fail to arrest the fall entirely. Follow this 5-step safety check every time you put on a full-body harness.

Step 1: Unpack and Inspect the Harness Before donning, visually inspect the entire harness. Check for frayed webbing, cuts, burns, or broken stitches. Examine all metal components like D-rings, buckles, and adjusters for cracks, deformation, or corrosion. Never use a damaged harness. Ensure the harness is the correct size for your body weight and height according to the manufacturer’s specifications.

Step 2: Don the Harness and Connect All Buckles Slip your arms through the shoulder straps, one on each side. The D-ring on your back should be centered between your shoulder blades. Connect the chest strap and leg straps. Ensure all buckles are fully engaged and snapped shut. Paginated or tongue-style buckles must be passed through the keeper to prevent loosening.

Step 3: Adjust the Shoulder Straps Tighten the shoulder straps so the harness fits snugly but not restrictively. The straps should lie flat against your body without twisting. There should be no slack in the webbing that could cause the harness to shift. A properly adjusted shoulder strap prevents the D-ring from sliding to one side during a fall.

Step 4: Adjust the Leg Straps Adjust each leg strap so the strap is comfortable but snug. You should be able to slide only two fingers between the strap and your leg. Loose leg straps can cause severe groin injury during a fall, while overly tight straps can restrict circulation. Ensure both straps are adjusted equally and secured.

Step 5: Perform a Mobility Check and Final Check Squat, bend, and reach your arms overhead. The harness should allow full freedom of movement without riding up or digging into your body. Ask a co-worker to check that all straps are flat and properly connected. Finally, confirm the dorsal D-ring is positioned in the center of your upper back. If you cannot reach it, ask for assistance. If any part feels off, repeat the above steps. A correctly fitted harness should feel like a second skin—secure, not restrictive. Never skip this 5-step check. It takes only a minute but could save your life. Remember: in fall protection, fit is everything.