The Radians SV22GL-2 Economy Type R Class 2 Safety Glow-In-The-Dark Vest with two-tone trim is perfect for mine workers, construction work that extends past sundown, parking lots, shipyards, cruise ships, or anywhere that there will be limited light needed for reflective tape. Charging the vest for 30 minutes in sunlight will allow the vest to glow-in-the-dark for approximately 8 hours. You can also charge the vest with indoor light, but it will not glow-in-the-dark as long as sunlight charging. The phosphorescent glow-in-the-dark tape will charge for up to 15 washes. Custom imprinting available for the left or right chest and back center.