Srixon ZXiR Iron Set Flex/Shaft:Stiff/Steel Material is 92% polyester and

Material is 92% polyester and 8% spandex

Thinner and more flexible

A thinner CORTECH Face expands the high-speed rebound zone

Fully loaded with plenty of storage

Srixon ZXiR Iron Set Flex/Shaft:Stiff/Steel Material is 92% polyester andCrafted with obsessive detail to performance and style, ZXiR blends completely new materials and cavity back construction with signature Srixon aesthetics for a game improvement model that feels even better than it looks. i ALLOY i ALLOY is a brand new steel with better feel, created by Srixon. Its significantly softer than the 431 steel commonly used in this category, as well as less dense, while still meeting the strength and durability needs Srixon