I have paralysis of the lower extremities due to multiple sclerosis. A few years ago I started wrapping a double D-ring belt around each knee (and sometimes ankles) to allow my legs to move more easily. The strap holding the "rod" portions of the "D" together will be stretched, allowing the "D" to move, which can cause the strap to begin to slip off. The "buckle" of THIS BELT works better than D-ring straps because the functionality of the buckle is independent of the elasticity of the strap itself. Unfortunately, the "buckle" of this tactical belt also allows for some slippage. BUT at least what I have found so far is that the tactical belt distributed by JUKMO is superior to the other two belts. OPTIONAL, the JUKMO tactical belt is equipped with a quick release buckle that makes it easy to pull the belt through the buckle again each time you use it. Just fasten or loosen the quick release buckle. QUICKLY! BRIGHT! SECURE!