Tenacious Holdings, Inc Ergodyne 59991 Ergodyne Skullerz Elastic Retainer Strap

Features:

• Inserts into temple slots, twists and locks
• Easy to use
• Elastic material ensures snug, secure fit to prevent movement
• Use alone or with foam gasket insert (sold separately)
• For use with Odin, Dagr, Kvasir and Valkyrie safety glasses