APTRO Men's Swim Trunks 9 Inch - Quick-Dry Polyester

APTRO Men's Swim Trunks 9 Inch are long board shorts with quick-dry polyester, a mesh liner, and a knee-length cut. The US listing identifies model DZAPT000416 and gives the inseam as 9 inches.

Quick-Dry Construction

The fabric uses water-repellent technology and is described as lightweight, soft, and quick drying. The shorts also carry a UPF 50+ claim, while the elastic waistband and drawstring provide adjustable closure.

The lining is mesh, and the pocket layout includes two slanted mesh pockets plus a rear cargo pocket with a hook-and-loop flap and drain hole. Walmart lists the Gray MK36 version as 92% polyester and 8% elastane, with machine washing specified.

US Sizes And Fit

The US size chart runs from Small to 5X. Listed waist measurements range from 31-32 inches in Small to 46-48 inches in 5X, while the inseam remains 9 inches across the chart.

The product dimensions shown by Amazon are 5.51 x 4.33 x 0.79 inches, with a listed weight of 7.04 ounces. Those figures are product-detail measurements rather than the garment's full worn length.

Price And Category Context

Walmart listed the Gray MK36, medium-size version at $17.99 (as of 09/24/2026). The same listing identifies APTRO as the brand and the garment as men's swim trunks.

Compared with shorter swim trunks, the 9-inch inseam provides more leg coverage, while the three-pocket layout adds storage that a simple two-pocket design may not provide. The tradeoff is a longer silhouette and a mesh liner that may feel warmer than unlined board shorts.

Verdict For Pool And Beach

This is a practical choice for men seeking knee-length swim trunks with UPF 50+, a drawstring waist, mesh support, and extended US sizing. The strongest fit is pool, beach, vacation, and casual warm-weather use; shoppers wanting a short athletic brief or a compression liner need another design.