Under Armour Shorts For Men Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

BALENNZ is the best-performing under armour shorts for men brand in July 2026, moving 20,000 units across 1 ASIN for 32.8% of Top 10 volume. BOOJO follows with 15,000 units (24.6%), ahead of Under Armour on 10,000 units (16.4%).

With 6 brands splitting the Top 10 and 73.8% 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 $16.29 to $29.77, 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: B0C2DSSX24 booked 2K units at $42.00, with ▲ 100.0% MoM change. On the growth side, B08JGBB9N1 leads positive momentum with ▲ 100.0% MoM growth on 20K units, with B0CZBMZ9SW close behind at ▲ 100.0% MoM on 400 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.