Breathable hollow mesh elastic fabric, soft and skin-friendly. 4 hooks & 3 rows design for flexible size adjustment. Durable metal hooks with fine stitching. Available in nude and black two common colours. Good elasticity prevents tightness when bra feels snug. Compatible with most standard 4-hook back closure bras. Easily expand underbust circumference for extra comfort. Simple to attach and remove. Ideal for pregnancy, weight fluctuation or when your bra feels tight. Lightweight, will not create obvious bulges under clothing.