Reebok Unisex ERS 4000 Shoes Size:8.5 Triax Fiberglass

Triax Fiberglass

LANYARD INSERT: Included

High performance blended formula with additional boost additives

Taffeta Lined

Reebok Unisex ERS 4000 Shoes Size:8.5 Triax FiberglassThe ERS 4000 will feature the original Energy Return technology system from the early 90's. There are many recognizable Reebok running Technologies over the years, but one of the most sought after and recognizable is ERS. Reebok Energy Return System features a soft , but very responsive Hytrel TPU tube from Dupont industries. This tech first launched in the late 80s in performance running and soon after became a staple of Reebok performance extending