Premium Quality: These boys' briefs are made of 100% Cotton. Durability -- Stretchy cotton material, no easy to deform, color fading or pilling. Comfortable Design -- These will become your kid’s favorite briefs, both because they have adorable Soft cotton designs and they’re absolutely COMFORTABLE! The stretchy fabric of these pairs of underwear is unbelievably soft and breathable. Elastic Waistband -- Elastic waistband comfortably fits on the waist and easy to pull up and down, stretch full of the underwear means no red marks and makes his movement more freely. Machine Washable -- Retains shape and color after wash.