XD Performance XD Kevlar Medicine Ball - Burst Proof Medicine Ball - Abrasion Resistant Wall Ball - XD Fitness Color: Dark Gray. Available in 10", 14", or 18" Diameter. Dense Kevlar shell and Kevlar stitching for maximum durability. Retains shape slam after slam. Abrasion resistant. All-weather, water resistant for outdoor use. Textured surface for better grip. Embroidered weight increment - poundage stitched into surface not spray painted. Available from 4 to 20 lbs in 10" size, 4 to 50 lbs in 14" size, 40 to 150 lbs in 18" size.