Bathrobes are generally made of four different fabrics.
Cotton: Cotton is a natural fibre consisting primarily of cellulose and is one of the most commonly used fibres in textile manufacturing. Due to the hydrophilic nature of cellulose, cotton absorbs water easily and is frequently used by the beach, pool, or following a shower. Cotton robes are especially suited to use in hot climates because cotton tends to absorb perspiration.
Silk: Another common fabric used in robes is silk. Silk is a fine lustrous fibre composed mainly of fibroin and produced by the secretions of certain insect larvae (normally silkworms) forming strong, elastic, fibrous thread. These kinds of bathrobes can be relatively expensive due to the cost of producing silk. Such robes are very thin and lightweight. These bathrobes are not particularly suited to wet environments because they lack the surface area and polarity necessary to absorb water However, silk dressing gowns are the traditional choice, since they are not worn after bathing.
Microfibre: Microfibre is an extremely fine synthetic fibre, typically made of cellulose or polyester, that can be woven into textiles to mimic natural-fibre cloth. Modern microfibres are developed to maximise breathability and water absorption and can be thinner than the width of human hair. Much like silk, robes made out of microfibre are light in weight and are very soft to the touch. Microfibre is flammable.
Wool: Wool is common in colder climates.
Nylon: Nylon is a synthetic fiber occasionally used in inexpensive bathrobes. It is valued for its ability to be cleaned easily.