Made of Dacron material with good resilience and good wrinkle resistance. , small size and light weight, compatible with most ear-hanging masks on the market. The nonslip design helps to fix the masks, hats, bras well and make them more comfortable to wear. The mask extension straps can be adjusted from 5 to 7.5-inch, easy fit adults or kids head circumference. When you need to rest and , just hung on your neck and no need to worry it will fall off. Features -Color:Black -Material: Dacron (flexible) -Made of Dacron material with good resilience and good wrinkle resistance. - , small size and light weight, compatible with most ear-hanging masks on the market. -The nonslip design helps to fix the masks, hats, bras well and make them more comfortable to wear. -The mask extension straps can be adjusted from 5 to 7.5-inch, easy fit adults or kids head -circumference. -When you need to rest and , just hung on your neck and no need to worry it will fall off. Package list: 5 x insert style extension ropes, 5 x buckle style extension ropes