Upairy Training Pants For Boys Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Hanes is the best-performing upairy training pants for boys brand in July 2026, moving 4,500 units across 4 ASINs for 34.4% of Top 10 volume. Ninjamas follows with 4,000 units (30.5%), ahead of MooMoo Baby on 3,000 units (22.9%).

With 6 brands splitting the Top 10 and 87.8% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $15.84 to $55.99, which frames the price band a competing listing has to justify.

Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, one ASIN forced its way in: B09262RCSS booked 300 units at $28.89, with ▲ 50.0% MoM change. On the growth side, B0887QT48N leads positive momentum with ▲ 300.0% MoM growth on 200 units, with B0FT75DVXB close behind at ▲ 100.0% MoM on 200 units.

The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.