Sperm cryopreservation is the process of freezing and storing sperm at cryogenic temperatures for future use in fertility treatment or sperm banking. When stored correctly in liquid nitrogen, sperm samples can remain viable for many years. Cryolab supply CBS High Security Sperm Straws, CBS Embryo and Sperm Straws and CBS Sterile Clear PETG Sperm Straws for sperm cryopreservation applications.