Tactical Knee Pads - quite pleased with the product and service. Knee pads are not as rigid as they appear to be - the plastic impact knee cap gives enough to be comfortable. I ordered large and should have ordered the medium but was able to take up enough of the slack in the adjusting straps so the pads stayed in position. I have no guide for sizing these - they are worn over a BDU pant so I guessed too large this time.