Moisture wicking polyester spandex with a compression fit for precise and accurate fit. Flat seam stitching to prevent skin irritation. Vented mesh jock pocket. Wide brushed waistband and reinforced large Velcro sock holder tabs to hold socks in place. Soft sided protective cup included. Jock Size Waist X-Small 28" - 30" Small 30" - 32" Medium 32" - 34" Large 34" - 36" X-Large 36" - 39" XX-Large 39" - 43"