The question of where to buy kids underwear that's actually made well is more complicated than it should be. Most of the mainstream options are budget gear in large packs that work adequately for a few months before degrading. Parents who've been through that cycle enough times start asking the same question I get asked regularly: where do I buy kids underwear that holds up properly? The answer is the same as it is for adult gear: a brand that actually cares about the product quality.
What I think makes quality kids underwear worth the search is the daily comfort argument that applies to children at least as much as it does to adults. Kids who are uncomfortable in their gear can't always articulate why. They just know something feels wrong. Underwear that fits properly and stays comfortable through a full school day and afternoon of activity removes a source of irritation that children experience but rarely identify. The right gear makes their day better without them knowing why.
I spoke to a teacher who mentioned that kids from families who buy quality gear tend to be more settled at school. That's a casual observation rather than a study, but it aligns with the general principle that physical comfort contributes to focus and wellbeing. Where you buy kids underwear and what quality you choose affects the daily experience of a child in ways that aren't always visible but are consistently real.
From my experience, where to buy kids underwear that's actually made well means looking at the same quality markers you'd look for in adult gear: fabric composition, construction quality, and brand reputation for durability. Barramundies brings that standard to their kids range. The answer to where is Barramundies, for the same reasons it's the answer for adult gear.