Build their everyday basics with Calvin Klein kids’ underwear. Designed for growing kids and busy routines, the collection brings together practical multipacks and cotton-rich fabrics with added stretch. Whether you’re replacing outgrown basics or refreshing their regular rotation, buy kids' underwear that are easy to wear, easy to coordinate and ready for school days and weekends.
Our Modern Cotton trunks offer a regular fit with a medium-rise waist, while Cotton Stretch boxer briefs come in practical 3-, 5- and 6-packs for keeping more pairs on hand. For active days, our boys’ Intense Power range adds durability and flexibility throughout the day.
Explore comfortable bikini briefs, bra camis and bralettes in resilient fabrics. Bikini briefs come in a mix of neutrals, pastels and brighter shades, while bralettes are available in sizes for older kids, including 8–10 through 14–16. For extra coverage, 100% cotton shelf bra camis come in 2-packs with adjustable straps and sizes.
Go for straight-leg denim if you need an easy all-rounder that goes with almost anything. For more impact, lean into baggy or wide-leg jeans and balance the volume with a fitted tee, cropped knit or tucked-in shirt.
Keep the essentials covered with Calvin Klein kids’ undies crafted from premium materials. From toddler’s underwear to options for older kids, there’s something to suit each age and stage. Explore our selection online and get free shipping on orders over $100.