7 Pairs Kids Cotton Briefs. Style - A pack of 7 kids cotton blend briefs in a range of fun designs, available in age 2-8 years. Sizes - To Fit Waist (in/cm) 2-3 Years (20"/51cm), 3-4 Years (21"/53cm), 5-6 Years (23"/58.5cm), 7-8 Years (24.5"/62cm). Material - Plain: 100% Cotton, Marl: 65% Polyester 35% Cotton. Made from a super soft polyester/cotton material, which boasts from being soft against the skin, breathable, durable and very easy to care for. Comfort - Featuring an elasticated waistband in a soft fabric, for all day comfortable wear. Multipack - These briefs come in a mixed pack of 7 pairs so you can stock up your little ones underwear drawer and always have a pair for the day ahead.