Calvin Klein Boys 2 Pack Intense Power Boxer Trunk, Black / Grey Logo Great Value 2 Pack Calvin Klein Signature logo waistband. Extra stretch for comfort and movement Fabric Composition: 95% BCI Cotton / 5% Elastane MPN: b70b700122-001 Our Collection at Boxers and Briefs contain only the highest quality Calvin Klein Boys Underwear. One of the most popular CK Boys ranges is the Intense Power collection The Intense Power Range for boys' underwear features a bold logo waistband and is made from soft cotton with extra stretch for comfort and movement. Within this range we have the Black / Grey Logo Calvin Klein Boys 2 Pack Intense Power Boxer Trunk, which are available in size Large, X-Large and XX-Large (ranging from ages 10 to 16). Calvin Klein Boys Underwear Size Guide: Age 8-10 = est. height 128-140 cm, Age 10-12 = 140-152 cm, Age 12-14 = 152-164 cm, Age 14-16 = 164-170 cm