They are made of 66% nylon ,24% polyster and 10% spandex. Perfect for fitness, exercise, hot yoga, gym, workout, pilates, weight lifting, lunges, cross-training, running or anything that involves bending over or everyday use. There are sizes of S, M, L, XL. You can choose Black, Purple, Blue, Pink, and Red. Hand or Machine Wash. Blank or custom LOGO is available.