Water, sunshine, and a flat look – Gaff Swim Trunks made for the pool!

These flattening swim trunks are a version of our bestselling gaff boxer briefs – but designed specifically for the pool and beach! They look identical and feature the same strong flattening cut and thicker front panel, but they’re made from a different fabric: stretchy, chlorine-resistant, and perfect for water activities.

The result? Maximum flattening, comfort, and a natural look – whether you’re swimming, sunbathing, or playing beach volleyball.

Optional Add-Ons for Your Swimsuit:

1. Swim Skirt – discreetly covers the intimate area, giving more freedom and confidence.
2. Beach Cover-up – perfect for beach strolls or the walk to the pool.

Both the Beach Cover-up and Swim Skirt are available in four universal sizes: 2XS/S, M/L, XL/2XL, and 3XL/4XL. We’ll automatically match their size to your swimsuit unless you request otherwise in the order notes.

How to Measure Yourself?

The easiest way to measure yourself is with a measuring tape (you can also use a piece of string and then measure it against a ruler). If possible, ask someone to help you!

Waist measurement: Stand upright in a natural posture, ideally wearing underwear or thin clothing. Locate your natural waistline — the narrowest part of your torso, just above your belly button. Wrap the measuring tape around your waist, making sure it’s level and parallel to the floor. The tape should not be too tight or too loose — it should sit snugly against your body without squeezing. Breathe normally, stay relaxed, and take the measurement.

Chest circumference: Measure relaxed, without clothes (if you have a large, sagging chest, it's best to wear a thin layer of underwear) around the chest at its widest point. The tape should lie flat against the body all the way around. It should not be too tight or too loose.

What Material Is Our Tucking Swimwear Made Of?

Our swimwear are made entirely from high-quality, elastic knit fabric. Chlorine-resistant and ideal for both pool and sea use, the material is super stretchy, breathable, and moisture-wicking – ensuring lasting comfort, even during long wear. It’s soft to the touch, durable, and keeps its shape and quality even after many swims.

Returns and Exchanges for Swimwear and Accessories:

⇒ Click here to read our full return, exchange and refund policy.

NOTE: For swimwear, returns and exchanges are not possible once the original sealed packaging (foil bag with a sticker) has been opened. This hygiene protection ensures that your product is brand new and has never been used.