Polo Underwear Men Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

BAMBOO COOL is the best-performing polo underwear men brand in July 2026, moving 21,000 units across 4 ASINs for 46.7% of Top 10 volume. Hanes follows with 16,000 units (35.6%), ahead of Champion on 6,000 units (13.3%).

With 4 brands splitting the Top 10 and 95.6% 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 $21.60 to $37.48, 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. On the growth side, B06XWR89JY leads positive momentum with ▲ 800.0% MoM growth on 900 units, with B07H8B1262 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.