Is it better to use two springs or four spring vibrators for climbing knee pads?

The support strength of two and four spring brackets is different. This should be chosen according to your own amount of exercise, physical strength, exercise habits and knee joint conditions. Just look at the knee pads. Of course, the support of four is better, but the flexibility of four is slightly worse than that of two, so when climbing, one will not be used to it. If the ordinary mountaineering load is not too high, the knee joint is not uncomfortable. Two spring support bars are enough. I use patented knee pads, which are very good.