GYM Cotton/Modal Jockstrap. This jockstrap is made of a combination of Cotton/Modal and Elasthane fabric which provides both support and adequate stretch. The super comfy elastic waistband is a full 2" thick. Complete with super thick 1.5" legstraps. A super comfortable jockstrap for work or play. Available in Black or White or Blue. Fabric: 47% Cotton/47% Modal/6% Elasthane. Size Chart (Inches) Small 30-31 Medium 32-33 Large 34-35 X-Large 36-37 XX-Large 38-39 3XL 40-41. PLEASE NOTE: This product runs smaller than other GYM products and it is recommended you size up one size.