Muscle Shirts For Men Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Gildan is the best-performing muscle shirts for men brand in July 2026, moving 17,000 units across 4 ASINs for 42.5% of Top 10 volume. Fruit of the Loom follows with 11,000 units (27.5%), ahead of Hanes on 7,000 units (17.5%).

With 5 brands splitting the Top 10 and 87.5% 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 $16.98 to $21.70, 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, 3 ASINs forced its way in: B09DCB77Z4 booked 3K units at $17.09, with ▲ 50.0% MoM change.

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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.