☆ Limited time offer today! This is GRIVEL's Air Tech New-Matic, semi-automatic crampons compatible with mountaineering boots that have a heel welt. I purchased these new 5 years ago to match my boots and used them 1-2 times a year, for a total of 5-8 times. The strap belts were cut to leave about 15cm extra to fit my boots (the tips have been heat-sealed with a lighter and treated with instant glue). I used them on EU44 (28.3cm) boots, so they should fit most standard sizes. ※ I always took care of the crampons after each use, so I think the condition is good, but ⚠ when disassembling them for cleaning, I couldn't tell the left and right apart, so I marked them with L and R on the inside with a marker. Other than that, there are some scratches and rust from use, but I would appreciate it if you could understand that these are USED items, including the L and R markings. - Brand: GRIVEL - Model Name: AIR TECH New Matic - Color: Yellow/Black - Accessories: New, unopened accordion (to reduce snow build-up) GRIVEL original crampon case ※ There are no smokers in my family, and we do not have any pets.