The Alkali RPD Visium Padded Jock is built with 16-way stretch Lycra and ergonomic foams to provide a close-to-the-body fit and snug feel. 16-way stretch Lycra is designed so that you get every ounce of power from each stride you take unlike other materials on the market that inhibit your range of motion.
Alkali Sizing Guidelines:
Jock Size / Waist Size (inches)
SR S/M / 32" - 36"
SR L/XL / 36" - 38+