- Ultra-thin FLEXZENSE FUT-MFBL lining, ideal for protecting feet from irritating seams, straps, and laces - Pareflex Foam plant-based foam: soft, flexible, and 100% plant-based material for greater comfort - Trimmable design, adaptable to any type of strap or shoe lacing - Patented DURAGLU adhesive, specially formulated for shoe inserts and linings - Pack of 4 units in obsidian black color, discreet and easy to use - Prevents friction, rubbing, and blister formation in sensitive areas of the foot - Effective and discreet protection thanks to its small footprint design - Compatible with insoles, heel supports, and other orthopedic accessories - Versatile solution for foot care and protection in daily shoe use