Invisible Gel Arch Supports, 1 pr, QC99759 Sale! This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Invisible gel cushioning provides comfort and relief to the heel area where shoes rub. Cushions provides a better shoe fit while eliminating friction and rubbing that can cause irritation. Protects against blisters. Ideal for all shoe types. One size fits most.