
Product Description
Introducing the next generation of swim briefs designed to shape your butt like never before! Featuring hidden padding that provides instant volume and definition, our briefs cover your entire backside without the excess fabric found in boxer briefs, boxers, or trunks. Feel confident and comfortable in your own skin!
With Rounderbum H2O, we no longer leave you stranded at the water's edge. Our new swimwear line offers all the technology and innovation you’ve come to expect from Rounderbum. Whether you're splashing in the pool or playing in the surf, our H2O dual-tech brief has you covered. The package technology eliminates the shrinkage effect (you know what we mean), so you can strut out of the water with confidence. Our padded tech is designed to repel water and dry quickly, providing a volume boost to your backside. The comfortable elastic waistband and drawstring ensure a snug fit. After helping you "say goodbye to saggy jeans," we’re now bringing that same confidence to your summer adventures.
SHAPING YOUR BEACH BODY!
FEATURES
- [PADDED Tech]® + [PACKAGE Tech]®
- Removable padding
- Round Bum Effect
- Waistband Fasteners
- Quick Dry
COMPOSITION & CARE
- Body: 80% NYLON 20% ELASTANE
- Lining: 90% NYLON 10% ELASTANE
- Machine wash cold. Use mild detergent. Please don't use bleach. Hang to dry. Do not iron. Do not soak.
Availability & Sizing
Product Details
Price History
Historical Data
Last 1 days of price history
| Date | Low Price | High Price | Average Price | Vendors |
|---|---|---|---|---|
| May 6, 2026 | $34.50 | $34.50 | $34.50 | 1 |
Price Statistics
Description
Introducing the next generation of swim briefs designed to shape your butt like never before! Featuring hidden padding that provides instant volume and definition, our briefs cover your entire backside without the excess fabric found in boxer briefs, boxers, or trunks. Feel confident and comfortable in your own skin! With Rounderbum H2O, we no longer leave you stranded at the water's edge. Our new swimwear line offers all the technology and innovation you’ve come to expect from Rounderbum. Whether you're splashing in the pool or playing in the surf, our H2O dual-tech brief has you covered. The package technology eliminates the shrinkage effect (you know what we mean), so you can strut out of the water with confidence. Our padded tech is designed to repel water and dry quickly, providing a volume boost to your backside. The comfortable elastic waistband and drawstring ensure a snug fit. After helping you "say goodbye to saggy jeans," we’re now bringing that same confidence to your summer adventures. SHAPING YOUR BEACH BODY! FEATURES [PADDED Tech]® + [PACKAGE Tech]® Removable padding Round Bum Effect Waistband Fasteners Quick Dry COMPOSITION & CARE Body: 80% NYLON 20% ELASTANE Lining: 90% NYLON 10% ELASTANE Machine wash cold. Use mild detergent. Please don't use bleach. Hang to dry. Do not iron. Do not soak.
Additional Info
Vendor Comparison (1 stores)
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| Vendor | Price | Stock | Last Updated | Action |
|---|---|---|---|---|
Underwear Expert Best Price | $34.50 | Out of Stock | 5/6/2026 | View Product → |
Available Sizes & Variants (11)
| Variant | Size | Color | Price | Status | Stores | Buy |
|---|---|---|---|---|---|---|
Black / S | S | Black | $34.50 $69.00 | In Stock | 1 store | Buy |
Black / M | M | Black | $34.50 $69.00 | In Stock | 1 store | Buy |
Black / L | L | Black | $34.50 $69.00 | Out of Stock | 1 store | — |
Black / XL | XL | Black | $34.50 $69.00 | Out of Stock | 1 store | — |
Blue / S | S | Blue | $34.50 $69.00 | In Stock | 1 store | Buy |
Blue / M | M | Blue | $34.50 $69.00 | In Stock | 1 store | Buy |
Blue / XL | XL | Blue | $34.50 $69.00 | Out of Stock | 1 store | — |
Blue / L | L | Blue | $34.50 $69.00 | In Stock | 1 store | Buy |
Black & White / S | S | Black & White | $34.50 $69.00 | In Stock | 1 store | Buy |
Black & White / M | M | Black & White | $34.50 $69.00 | In Stock | 1 store | Buy |
Black & White / L | L | Black & White | $34.50 $69.00 | Out of Stock | 1 store | — |





