The crampons worked well in the Polish mountains up to just under 1400 meters above sea level in April. In some places, the snow reached intimate areas, while in others, just above the ankles. Stability with the crampons versus without them was incomparable. The product improved movement on snow, made trail walking easier, and gave an advantage over tourists who, without this accessory, struggled to keep their balance on slippery surfaces, even in relatively flat areas. Personally, I did not slip even when descending rather steep spots. Thanks to this useful product, I saved a lot of energy in demanding terrain. I recommend it to everyone who doesn't plan on adding extra balance training to their winter trekking :) Size "L" fit men's trekking boots size 43 from a well-known company beginning with the letter "Q." As you can see in the photo, I didn't even remove the size tag attached to the crampons. They were hard to put on but held well. I had no problems with them slipping off the boots. I wondered whether they would be a good choice or if I should go for an option with more spikes. As it turned out, the number was sufficient, and thanks to there being fewer spikes, I saved a bit more money and the product was lighter—which, as we know, is also a plus : )