Seobean Retro Trunks with Button Fly

Channel vintage sporty vibes with these retro trunks from Seobean. The functional button fly front adds classic charm, while bold color blocking and a striped logo waistband give you an athletic look that stands out. Crafted from 92% Cotton / 8% Spandex, they deliver soft, stretchy comfort for all-day wear — from morning workouts to evening downtime.

Functional Button Fly

The three-button fly front isn't just a retro detail — it's practical. Each metal button secures reliably, so you never worry about unexpected openings. Button fly also avoids the metal zipper irritation that flat-front briefs can cause, making these trunks more comfortable for sensitive skin.

Retro Athletic Color Blocking

Contrast side panels and a bold striped waistband with the "A" logo patch create a slimming, athletic silhouette inspired by vintage sportswear. The color blocking draws the eye vertically, elongating your frame — a design trick borrowed from retro swimwear and track shorts that works just as well in underwear.

92% Cotton — Soft, Breathable, All-Day Comfort

Cotton is the king of everyday comfort. It breathes naturally, absorbs moisture, and feels softer with every wash. The 8% Spandex addition means these trunks stretch with your movement and snap back to shape — no sagging, no bagging, even after a full day of wear.

• Material: 92% Cotton + 8% Spandex
• Sizes: S / M / L / XL / XXL (Waist 25–36 in)
• Colors: Multiple colorways with contrast panels
• Features: Button fly front, low-rise cut, short-leg trunk style, logo waistband, contrast side panels
• Care: Machine wash cold, tumble dry low

Five Ways to Wear Retro Button Fly Trunks

• Athletic Locker Room — Retro color blocking and logo waistband look sharp when you're changing at the gym
• Everyday Comfort — 92% cotton breathes through long office days; button fly avoids zipper irritation
• Weekend Lounging — Soft cotton and athletic styling make these your go-to weekend pair
• Vintage-Themed Photoshoot — Retro design and contrast panels create authentic throwback imagery
• Gift for the Classic Style Guy — Button fly + retro look appeals to men who prefer old-school charm over modern minimalism

How to Care for Cotton Trunks

Machine wash cold with similar colors. Avoid bleach and high-heat drying — cotton can shrink and the contrast panels may fade. Tumble dry on low or hang dry for best longevity. The spandex keeps the shape, so no ironing needed. Button fly construction is durable; check buttons periodically and replace any that loosen over time.