The OEM Skullerz Kvasir Removable Foam Gasket Insert is designed for easy use, snapping into place at the temple corners of your safety glasses. Its removable design allows for detachment when not needed or for cleaning purposes. The dynamic construction accommodates a retainer strap, ensuring a snug and secure fit. This gasket insert is specifically made for use with Kvasir medium-frame safety glasses, which are sold separately.