Nylon USP 4/0 - Distinctive Characteristics of Nylon suture: Nylon sutures are also known as polyamide sutures. Nylon sutures are monofilament sutures and are remarkably smooth, soft and gives excellent knot security. Nylon sutures are non-absorbable sutures and possess excellent tensile strength. Nylon sutures are available in blue colour. Nylon sutures have excellent knot security properties and can be easily removed with no tissue adherence. These sutures are infection resistant. Nylon sutures are widely used for general closure, skin and plastic surgery. They also do not support infection and maintain tensile strength indefinitely in tissues.