Waterproof Shower Curtain Liners Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Barossa Design is the best-performing waterproof shower curtain liners brand in July 2026, moving 80,000 units across 1 ASIN for 32.8% of Top 10 volume. Mrs Awesome follows with 60,000 units (24.6%), ahead of EHZNZIE on 30,000 units (12.3%).

With 10 brands splitting the Top 10 and 69.7% 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 $4.49 to $8.49, 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, B0G52GZ46L leads positive momentum with ▲ 100.0% MoM growth on 2K units, with B07BPZT63P close behind at ▲ 100.0% MoM on 2K 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.