Healthy and Safe Formula: MelodySusie upgraded gel base and top coat set is HEMA-free, HPMA-free, TPO-free, non-yellowing and low odor. This formula is friendly to those with sensitive skin. It does not contain irritating ingredients or adhesives that cause nail damage. | Smooth and Easy to Apply: The gel polish base coat brings a smooth application effect. The brush easily covers the edges, and the moderate viscosity allows you to apply smoothly. This product will solidify after being exposed to strong light, so they need to be stored away from strong light. It is also easy for beginners to have nail designs at home. The top coat nail polish gives your nails a glossy finish after you apply the colored polish. | Long-lasting and Durable: The base coat and top coat are flexible. The base coat can better adhere the color gel to the nail and help nail art to adhere better to the nail surface. When used properly, the base and top coat set provides hard, smooth protection against chipping, scratches or stains. The no-wipe glossy top coat helps your manicure last up to 21 days. | High Compatibility: This base and top coat is suitable for nail extension gel, gel nail polish, fake nails, natural nails, acrylic nails, dip powder nails, gel nail tips, etc. Cure under LED/UV lamp for 60-90 seconds. It is a great choice for professional nail salons or home DIY use. | Warm Tips: HEMA, HPMA and TPO are not the only ingredients that cause allergies. Skin contact may cause allergic reactions. This nail polish is only for nails. Avoid contact with eyes, mouth, and skin. If you feel any discomfort, stop using it immediately. Please keep this product out of the reach of children. If there are any problems, please contact us.