Improved Explosive Power and Jumping Balance Volleyball-Specific Insoles - Product Name: DSIS Sorbo Volleyball - Size: L (26.5 - 27.5cm) By stabilizing the heel with three arches and enabling the toes to be used properly, this insole protects the body from foot problems that often occur during the landing of jumps and steps, which receive strong impacts, and achieves excellent movement and performance. Thank you for viewing. I have used these a few times while waiting for a new pair as I outgrew them, so there are some minor stains on both sides. These are used items, having been used a few times, but they are in good condition. Please understand this before purchasing.