Seobean

Seobean Men's Low Rise Nano Boxer Brief with Slits - Cotton Blend Support

$9.50 USD

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Color: White

Size M L XL XXL

cm / kg in / lb

Size	Waist	Weight	Height
M	64–71	50–59	165–170
L	71–79	59–68	170–175
XL	79–84	68–75	175–180
XXL	84–89	75–84	180–185
3XL	89–94	84–93	185–190
4XL	94–99	93–102	190–195

Size	Waist	Weight	Height
M	25–28	110–130	5'5"–5'7"
L	28–31	130–150	5'7"–5'9"
XL	31–33	150–165	5'9"–5'11"
XXL	33–35	165–185	5'11"–6'1"
3XL	35–37	185–205	6'1"–6'3"
4XL	37–39	205–225	6'3"–6'5"

If your measurements fall between two sizes, size up for a looser fit or size down for more support. Sizing may vary slightly by style and brand.

Estimated Delivery Date:

30 Days Free Return

✓ Hassle-free returns within 30 days
✓ Free return shipping worldwide
✓ Full refund guaranteed
✓ No questions asked

Return Policy

Free Shipping to Worldwide

✓Free shipping worldwide on orders over $30
✓Orders under $30: $4.99 standard shipping
✓ 7-14 business days delivery
✓ Real-time tracking included

Our Amazon Store

Our Amazon Store of Men's Underwear:

Secret Packing

✓ Plain, unmarked packaging
✓ Discreet billing description
✓ Private delivery confirmation
✓ Your privacy is our priority

Premium Materials

92% Cotton,8% Spandex

Seobean Low Rise Nano Trunk — Breathable Slit Design

Feature 1: 92% Cotton + 8% Spandex — Soft cotton with 4-way stretch. Nano slit design enhances airflow and ventilation. Moisture-wicking keeps you fresh all day.

Feature 2: Body Shaping Technology — Advanced butt-lifting and belly control design provides a sculpted silhouette. Flattering under any outfit.

Feature 3: Innovative Nano Slit Design — Breathable slits enhance ventilation. Keeps you cool during workouts and all-day wear. Zero overheating, maximum airflow.

Feature 4: Low Rise Modern Trunk Fit — Contemporary low-rise trunk cut sits comfortably on hips. Sleek athletic look that pairs perfectly with low-rise pants.

Feature 5: Ergonomic Support Pouch — Contoured pouch provides superior support without restriction. Designed for active men who refuse to compromise on comfort.

Feature 6: 6 Colors, Extended Sizing — White, Blue, Gray, Navy, Red, Royal Blue. M-XXL. Every pair features the signature Seobean waistband for a premium look.

Material: 92% Cotton + 8% Spandex. Fit: Low-Rise, Body-Shaping. Colors: 6. Brand: Seobean.

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Men's Size Guide

Find your perfect fit with our men's size guide. We carry multiple brands, so these charts use the most common waist, chest, weight and height measurements across our underwear and tops to help you shop briefs, trunks, tank tops, shirts and more with confidence.

All measurements show metric first (cm / kg), then imperial (in / lb) below. Sizing may vary slightly by style and brand.

Men's Underwear Size Chart

If you fall between two sizes, consider your preferred fit: size up for a looser feel, or size down for more support.

Size	Waist	Weight	Height
M	64–71 cm 25–28 in	50–59 kg 110–130 lb	165–170 cm 5'5"–5'7"
L	71–79 cm 28–31 in	59–68 kg 130–150 lb	170–175 cm 5'7"–5'9"
XL	79–84 cm 31–33 in	68–75 kg 150–165 lb	175–180 cm 5'9"–5'11"
XXL	84–89 cm 33–35 in	75–84 kg 165–185 lb	180–185 cm 5'11"–6'1"
3XL	89–94 cm 35–37 in	84–93 kg 185–205 lb	185–190 cm 6'1"–6'3"
4XL	94–99 cm 37–39 in	93–102 kg 205–225 lb	190–195 cm 6'3"–6'5"

Men's Top Size Chart

Measure the fullest part of your chest and match it to the Chest column below. If your measurements are inconsistent, choose the larger size for a more comfortable fit.

Size	Chest	Weight	Height
S	81–86 cm 32–34 in	50–59 kg 110–130 lb	165–170 cm 5'5"–5'7"
M	86–91 cm 34–36 in	59–68 kg 130–150 lb	170–175 cm 5'7"–5'9"
L	91–97 cm 36–38 in	68–75 kg 150–165 lb	175–180 cm 5'9"–5'11"
XL	97–102 cm 38–40 in	75–84 kg 165–185 lb	180–185 cm 5'11"–6'1"
XXL	102–107 cm 40–42 in	84–91 kg 185–200 lb	185–190 cm 6'1"–6'3"

How to Measure

Waist

Wrap a soft measuring tape around your natural waistline, just above your belly button.
Keep the tape parallel to the floor and snug but not tight.
Record the measurement and match it to the Waist column in the underwear chart.

Chest

Stand naturally and wrap the tape around the fullest part of your chest, under your armpits.
Keep the tape level across your back and relaxed, not pulled tight.
Record the measurement and match it to the Chest column in the top chart.

Fit Tips by Style

Underwear

Briefs — Sit at the natural waist with a close, supportive fit. Follow the waist chart directly.

Boxer Briefs — Offer mid-thigh coverage with light compression. Choose your true waist size.

Trunks — Shorter legs than boxer briefs but the same waist fit. Use your regular waist size.

Thongs & G-Strings — Minimal coverage. If you are between sizes, size down for a secure pouch.

Boxer Shorts — Looser, more relaxed fit. If you are between sizes, size up for extra comfort.

Tops

Tank Tops — Usually fitted around the chest and shoulders. Choose the size that matches your chest measurement.

Shirts — Standard fit follows the chest chart. If you prefer a relaxed fit or layer underneath, size up.

Male Bodysuits — Close-fitting one-piece. If your chest and waist measurements fall in different sizes, choose the size that fits your chest and check the waist stretch.

Shop by Style

Browse all men's underwear and tops and filter by briefs, boxer briefs, trunks, tank tops, shirts and more.

Frequently Asked Questions

What size men's underwear should I buy?

Match your waist measurement to the Waist column in our underwear chart. Each cell shows centimeters first and inches below, so pick the unit you prefer. If your measurement falls between two sizes, consider the style and your preferred fit.

What size men's top should I buy?

Measure the fullest part of your chest and match it to the Chest column in our top chart. If you are between sizes, choose the larger size for a more comfortable fit.

What if my measurements fall between two sizes?

For a snug, supportive fit, choose the smaller size. For a looser, relaxed feel, choose the larger size. When your measurements are inconsistent, always choose the larger size.

Do underwear and top sizes use the same size letter?

Yes, both use S, M, L, XL, XXL, but the measurement columns are different: underwear is based on waist, while tops are based on chest. Always check the correct chart for the garment you are buying.

Do different styles fit differently?

Yes. Compression styles like briefs and trunks fit closer to the body, while boxer shorts are roomier. Tops such as tank tops and bodysuits are more fitted, while casual shirts may be cut looser.

Are these sizes the same for every brand on UndiesForMen?

Most brands we carry follow this waist and chest grading. Minor differences may exist between fabrics or cuts, so always check the style notes on the product page.

Frequently Asked Questions

What are men’s trunks?

Trunks are shorter-leg boxer briefs that sit higher on the thigh for a modern, streamlined fit.

What materials are they made from?

Stretch cotton and modal blends with a soft waistband for everyday wear.

How do I choose my size?

Match your waist size to the chart; trunks should feel supportive without digging in.

How should I wash them?

Cold machine wash and low-heat dry keep the fabric and waistband like new.

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Seobean Men's Low Rise Nano Boxer Brief with Slits - Cotton Blend Support