The hip bands are a mix of cotton and polyester, which gives it a long lifespan . The polyester makes the band elastic, and will fit great around the thighs. Machine washable at 40 degrees, but we recommend 30. Comes in three different degrees of stretch, perfect for any level of strength. The colours are fresh, and motivating. Use the bands when you warm up, or while performing squat, hip thrust and lunges. Comfort is key with hip-bands from Norgesbeast.