Front fabric: 100% polyester & Lining: 100% polyurethane. Comfortable and supportive stick-on strapless bra Reusable Self-adhesive invisible bra, thin silicone but strong sticky, super light and hold on all time that make you no burden No show backless bra best for low-cut outfits, create deep V shape charming breast. Skin friendly and hypo allergenic, perfect for all person and occasions Anti-dust/deformation packaging. Easy to carry for daily, travel or the special needs. When you take of this bra, put on the package and it will continue to restore the prototype Note: Clean skin before use this bra, sweat and powder will affect the effectiveness of the adhesive, so the sticky bra is not suitable for using in high temperature outdoors or doing exercise