Unique frame for use on slotted MSA caps. Patent-pending, stowable slot adaptors allow frame to work with or without earmuffs. Patent-pending V-shaped alignment guides and three touchpoint load for easy visor installation. Sloped design allows material to easily slide off the frame. Heavy-duty, flat rubber strap allows easy and secure placement of frame on the cap. Replaceable debris-control meets EN standards for molten metal and creates a tight seal between helmet and frame (included). All non-metal construction.