Two Pieces Swimsuit : The fabric is made of 90% Polyester,10% cotton, no-padded, breathable and comfortable. During the day it is a normal gray two pieces bikini swimsuit . But at night or in dim places ,they will super reflective when there is directly light hit it . If you want to test the reflective properties . You can try taking a phone light directly on it to test . Feature : Two pieces bikini swimsuit with adjustable buckles,pure color,reflective,sexy . The design makes you closer fitting, ultra chic and adorable. When you wear it on your body with the lights shining right through, you will be the center of attention in the crowd.