Men's Modal Boxer Briefs | Seamless Breathable Mid-Waist Underwear
- Made from Bamboo
- Hypoallergenic
- Soothes Sensitive Skin
- Free shipping Over $50
Luxury Softness, Built for Real Life
Not all underwear is created equal. MOSSRIVER modal boxer briefs are crafted from 40s high-count modal — a fabric so smooth and silky, it redefines what everyday comfort feels like. From morning commutes to late-night workouts, these briefs move with you.
✨ Key Features
- 40s High-Count Modal Fabric — Incredibly smooth, silky touch with superior skin-friendly breathability
- Seamless Construction — Zero pinching, zero chafing — unrestricted comfort all day long
- Mid-Waist Ergonomic Fit — Conforms to your body shape for a supportive, non-constricting hold
- 95% Modal + 5% Spandex Crotch Panel — Exceptional elasticity and supportive hold, even during prolonged sitting or intense movement
- All-Season Breathability — Eliminates stuffiness and stickiness; keeps you fresh and dry in any weather
🎨 Available Colors
Blue · Black · Grey
📐 Size Guide
Available in S / M / L / XL / XXL / XXXL / XXXXL — refer to our size chart for the best fit.
🛒 Why MOSSRIVER?
Premium materials, thoughtful construction, and a fit that works as hard as you do. Because great basics shouldn't be a compromise.
⚠️ Low Stock - Restocking Soon
Last Updated: 05/21, 2025
At MOSSRIVER, we know you're excited to receive your order — and we’re committed to getting it to you as quickly, safely, and gently as our clothes feel.
1. Where We Ship
We currently ship to the following countries:
United States
More regions coming soon!
2. Processing Time
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All orders are processed within 1–3 business days (excluding weekends and holidays).
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During high-volume periods (new drops or holidays), processing may take an additional 1–2 business days.
3. Shipping Options & Rates
United States 🇺🇸
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Standard Shipping (5–8 business days): $4.99 or free on orders $49+
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Expedited Shipping (2–4 business days): $7.99
International 🌍
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Calculated at checkout based on destination and order weight.
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Customers are responsible for any customs duties or import taxes.
4. Order Tracking
Once your order ships, you’ll receive a confirmation email with a tracking number.
Please allow up to 24–48 hours for the tracking to update.
5. Shipping Delays
While we do our best, some delays may occur due to:
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Carrier disruptions
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Customs processing (for international orders)
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Weather or natural events
If your package is delayed or seems lost, please email us at
📧 service@themossriver.com — we’ll assist you right away.
6. Wrong Address?
If you notice an error in your shipping address, contact us ASAP.
Once your order ships, we can’t guarantee address changes — but we’ll do our best to help.
7. Eco-Friendly Packaging
We use minimal, recyclable, and baby-safe packaging for every order — because what touches your baby matters, and so does what touches the planet.
1. What material is this made from? Is it safe for my baby’s skin?
Our products are made from a premium blend of 95% bamboo fiber and 5% spandex — ultra-soft, breathable, and perfect for sensitive skin. We never use flame-retardants or harsh chemicals, so you can dress your baby with confidence.
2. Is it suitable for all seasons?
Yes! The bamboo fabric is naturally breathable and temperature-regulating, keeping your baby cozy in the winter and cool in the summer. It's perfect for year-round comfort.
3. How should I care for this piece?
Simply machine wash cold on a gentle cycle and tumble dry on low. Avoid bleach, and use low iron if needed — it’s as easy to care for as it is to love.