Jockey Boy's Underwear Boys Performance Boxer Brief - 2 Pack 90% polyester/ 10% spandex. Machine wash and dry. Imported. Imported Machine Wash Style 776078 real performance activewear from Jockey&reg; moisture-wicking technology keeps him cool and comfortable any time of day fabric blend creates a more durable, softer feeling fabric with less shrinkage boxer briefs are the perfect choice to keep up with his active lifestyle