Final answer:
The NFSI certified high traction mat among the options given is the Phoenix Mat.
Step-by-step explanation:
The NFSI certified high traction mat among the options given is the Phoenix Mat.
The National Floor Safety Institute (NFSI) is an organization that certifies high traction mats to ensure they meet certain safety standards.
The Phoenix Mat is certified by the NFSI, indicating that it provides high traction and reduces the risk of slips and falls.
In contrast, the Signature series Z-fold, Cintas logo mats, and Sanus ultraclean mats are not mentioned to be NFSI certified high traction mats.