Sturdy and Super bright LED strips. Will remain bright for several hours with a new battery. One size fits most, fully adjustable suspender length sizing with an elastic slider on the piece that connects to the back of your pants. ☀ 4 Glowing Mode: Constant on,, Fast Blink, Slow Blink, Off. Requires 2 CR2032 batteries (included and replacable). Battery pack is integrated into the strap in the back area of the suspenders. Perfect for Concerts, Rave Festivals, Bars, Clubs, Electric glow run, LED parties, Halloween, Costume Parties, Mardi Gras, Carnivals, Gifts, and more.