Man grey vest with changing color led light, 50color opptional, and it is sync music controled by hand controller or mobile APP control. Size: Women's Sleeveless Hoodies size smaller size normal. for men just buy according your normal size, for women just buy 2 size smaller. Power: powered by 3pcs AA batteries(present battery case), or power bank. work time is around 4-6hours/time. Wash: can only wash by hand and carefully. when not use take batteries out and put it away from kids. Occasion:The fiber optic hoodies is the best novelty gift for Christmas new year birthday and festival. It is perfect for night out,cycling and running at night,and it eye-catching for party,stage,club,Singing performance,dancing,show, ballroom, concert,music festival and so on. UPC 789044197463 ASIN B0H2XPPK9L Size Small-Medium Color Grey Style Holiday Party Pattern Solid Material Nylon Brand Name LEDPATY Life Event Birthday Unit Count 1 Count Fabric Type 75% nylon,25% cotton Closure Type Zipper Number of Items 1 Import Designation Imported Age Range Description Adult Fit to Size Sentiment Runs Small Apparel Fabric Stretch No Stretch Product Care Instructions Hand Wash Only Sleeve Length Description Sleeveless