100% nylon with hook and loop closure. Bra extender material: made of soft, comfortable, and breathable cotton material with stainless steel hooks. 2-hook, 3-hook, and 4-hook bra extenders comfortably extend the reach of your bra band by approximately 2 inches. Suitable for adjusting the fit of new or old bras due to weight changes, pregnancy, or shrinkage. Designed for active and pregnant women. These extenders are a helpful addition when wearing maternity clothing or needing relief from a tight bra band. Package includes: 3 pieces of 3-row by 2-hook bra extenders, 3 pieces of 3-row by 3-hook bra extenders, and 3 pieces of 3-row by 4-hook bra extenders in black, white, and beige. Adjustable length fits most bra sizes. Hook spacing: 2-hook style has 1/2 inch between hook centers; 3-hook and 4-hook styles have 3/4 inch between hook centers. Easy to use: attach the hooks on the underside of the extender to your bra’s loop closure, then connect the bra’s hooks to the loops on the front side of the extender.