The BIOM Golf Hydromax's uppers are designed with a combination of Hydromax™ and Yak leather. Yak leather is 3x stronger than other leathers, and Hydromax™ leather provides water and stain resistance. The combo offers lightweight comfort and durability, while still maintaining the breathability of the shoe to keep feet cool and dry.
The DryJoys have full leather uppers made with ECL™ or "Extreme Comfort Leather", which is FootJoy's proprietary waterproofing system developed with Pittards® of England. ECL™ Advanced Waterproof Leather is membrane-free and is also 30% softer than the company's previous generations of performance leather.
4 of the Summer Series' styles have mesh uppers that enhance the shoes' breathability and that also stretch to give the feeling of a custom fit (#98951, #98975, #98968, #98854). The remaining 3 styles feature full grain leather uppers that provide excellent comfort, durability and breathability, as well as some water resistance (#98944, #98899, #98842).