Men's Rayon Boxer Briefs | Breathable Stretch Mid-Waist Underwear

All-Day Comfort, Zero Compromise

Your underwear shouldn't be something you think about. MOSSRIVER rayon boxer briefs are engineered to disappear into your day — so soft, so breathable, you'll forget you're wearing them.

✨ Key Features

• 95–100% Premium Rayon — Silky-smooth hand feel, naturally breathable and lightweight
• Moisture-Wicking Performance — Draws sweat away from skin to keep you cool and dry all day
• 4-Way Stretch Knit — Moves with your body; no bunching, no riding up
• Mid-Waist Silhouette — Supportive fit with a durable elastic waistband that stays in place
• Versatile Design — Solid colors that work for sport, office, travel, or everyday wear

🎨 Available Colors

Black · Dark Gray · Light Gray · Blue Gray · Sky Blue · Royal Blue · Green · Red

📐 Size Guide

Available in S / M / L / XL / XXL — refer to our size chart for the best fit.

🛒 Why MOSSRIVER?

We believe great basics start with great materials. Every pair is crafted for lasting comfort — because the foundation of a great outfit starts with what's underneath.

⚠️ Low Stock - Restocking Soon

Last updated: August 8, 2026

We want you to know what to expect after placing an order. The checkout page is the final source of truth for the destination, rate, and delivery option available for your order.

1. Current shipping region

This store currently lists shipping within the United States. If checkout does not offer your destination, please contact service@themossriver.com before ordering.

2. Processing time

• Orders are normally processed within 1–3 business days, excluding weekends and holidays.
• New drops, holidays, or unusually high order volume may add 1–2 business days.

3. Shipping options and rates

• Standard shipping: usually 5–8 business days after processing; $4.99 or free on orders $49+.
• Expedited shipping: usually 2–4 business days after processing; $7.99 when available at checkout.

Delivery estimates are estimates, not guarantees. The rate and option shown at checkout control if they differ from this summary.

4. Tracking

When your order ships, we send a confirmation email with tracking information. Please allow up to 24–48 hours for the carrier page to begin updating.

5. Delays or a package that appears lost

Carrier disruptions, weather, and address issues can delay delivery. If your package is delayed or appears lost, email service@themossriver.com with your order number and we will help review it.

6. Address changes

Contact us as soon as you notice an address error. We cannot guarantee changes after fulfillment or shipment, but we will review the request promptly.

7. Packaging

We aim to use minimal, recyclable packaging where practical while protecting the products during transit.

Material details vary by product and collection. Before ordering, review the individual product page for the exact composition, fabric feel, fit, care instructions, and availability.

For family-matching holiday styles, do not infer one material for the entire collection. Use the specific product page and its listed composition as the source of truth.