This is the strongest insole. I used it for my child's 25.0 spikes. I've only used it for about a week. I wish I had known about it sooner. The link below has more details, but it's highly effective. I'm selling it because the next junior high school hardball baseball team uses tabi-style spikes. DIMENSIONING BODY LAB GROUNDX + CARBON Price: ¥19,800 S (24.5~26cm) https://dimensioningbodylab.com/products/groundx-carbon?variant=62416828203377 Changing "output itself" from your feet―― Ground X maximizes the force of your foot strike, taking the quality of your training to the next level. Foot strikes become stronger, and jump height increases by an average of +2.1cm. Stability is created, preventing wobbling even when landing on one foot, and balance control (COP) dramatically improves. And this "evolution of the feet" is directly linked to batting. With no wobbling of the axis and no loss of power, it has demonstrated clear numerical changes such as an average batted ball speed increase of +3.0km/h and a hard hit rate increase of +10%. Ground X is not just support, but a gear that strengthens the "connection with the ground" and fundamentally enhances your body's output. Training and batting. If your feet change, the dimension of your performance will change. 【Notes】 ・If you use one pair of insoles in several shoes (running shoes, spikes, weight shoes, etc.), the adhesive part of the carbon and sponge may be damaged when changing them, so frequent changes are not recommended.