Description NEW KIDS STYLES. Sporting a 4" inseam, our polyester underwear provides a mid-grade level of support that's suitable for most daily activities. In-between sizes? Order one size up for the best fit. Fabric content may vary by color. Features Medium Support Polyester Blend 4" Inseam Feather-Seam™ Construction Side Entry Fly Fit and Fabric 93% polyester, 7% elastane