Featuring an innovative engineered fit design

this is reinforced even further with the Nucleon Flex technology layer on the central back zone

it features Nucleon Plasma Technology—an eco‑friendly bio‑based blend with high‑performance polyurethane—plus extensive perforations and ventilation channels

with an additional shift pad extra layer and a reinforced shin area to protect against impacts

2021 tech 1 k start v2 shoes white black yellow flou YGroup_3352522 Featuring an innovative engineered fitWith a newly designed forefoot profile, Achilles friendly collar design, breathable laser perforations and reinforced external heel, the Tech 1 K V2 Start shoe is constructed from durable and lightweight microfiber for optimized levels of protection, comfort and performance fit.