2 pieces of thin strapsAdjustable strapsSoft and breathable fabric textureThis product has 95 Cotton and 5 Elastane. It is a perfect product for daily use in a double shirt. The natural fabric content offers a healthy and comfortable wearing comfort. Its seams do not disturb you. It has a soft and durable fabric feature. Cotton is a natural fiber. It is made of pure cellulose. Cellulose is synthesized in nature. It is an organic substance created by the use of organic chemicals. It has less elasticity.