Justin+Simon Underwear

The official Justin+Simon underwear collection

Justin+Simon creates modern men’s underwear with a clean, close and confident fit. The collection brings together smooth stretch fabrics, low-rise silhouettes, contoured pouches and body-conscious details across thongs, bikinis, trunks, jockstraps and bodysuits.

The brand is owned by MaleBasics. Every Justin+Simon style is developed by our team and made in our own factory in Colombia, giving us direct control over the pattern, construction and finishing. We design the pouch and stretch of each piece together so the front has room and support without unnecessary bulk.

Choose by coverage and occasion. Thongs and G-strings keep the back minimal and create a clean line beneath fitted clothing. Bikinis balance a low rise with more coverage, while trunks give the hips and seat a more familiar frame. Jockstraps use an open back and stable waistband, and bodysuits continue the fitted line through the torso.

Our shaping styles use contour seams, stretch and pouch geometry to create definition without assuming that tighter is better. A correctly fitted pouch should support and contain without flattening. Check the size guide on each product; Justin+Simon is cut close to the body, so the larger size is usually the better choice when you are between measurements.

Fabric changes how the same cut behaves. Smooth microfiber disappears more easily beneath clothing, while mesh and sheer options add airflow and make the construction part of the look. Follow the care label and let high-stretch garments recover between wears.

Browse the collection here, compare all cuts in gay men’s underwear, or explore more provocative designs from our sister label MOB Eroticwear.

The best starting point is the cut you already understand, followed by a new fabric or level of coverage.