A comfortable all-day outfit starts with great underwear — especially for kids. Irritating wedgies, itchy tags, chafing trims, and scratchy fabrics make a lot of styles uncomfortable to wear.To find the best underwear for children of a variety of ages, sizes, and preferences, we’ve tested more than 60 styles from 20 brands over the last five years with kid testers as young as 2 and as old as 12.We’re confident that the comfortable, durable Hanna Andersson Classic Underwear and Briefs are the least likely to leave kiddos whining about their underwear in the morning rush and throughout the day. Kids who like boxer briefs might prefer the soft, stay-in-place Lucky & Me Nolan Boxer Briefs.Parents seeking a thinner, more flexible style of underwear should turn to Reebok’s stretchy yet supportive Performance Boxer Briefs, Seamless Hipster Briefs, or Seamless Boyshorts. For kids who like to hang loose, we recommend Lucky & Me’s 100% cotton Noah Boxer Shorts. For those who want a slightly higher-cut bikini brief, we recommend the MeUndies UltraModal Kids FeelFree Bikini Briefs. And, if you’d prefer to spend less, we have budget options that are worth considering.