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The Beneunder Men's Lightweight Breathable Sun Base Layer UPF50+ combines advanced cooling technology with optimal sun protection. Designed with UPF50+ fabric, it effectively blocks harmful UV rays while keeping you cool and comfortable. The shirt's ultra-lightweight and breathable material ensures no sweat buildup, making it perfect for active outdoor activities. It features a unique design with a built-in face shield, adding extra UV protection for your face and neck. The lightweight construction offers great flexibility and freedom of movement, while its quick-drying fabric makes it an ideal choice for both sports and casual wear.
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Full UPF50+ Protection — One Shirt, Head-to-Hand Coverage
- Yarn-integrated sun protection blocks ≥99% of harmful UV rays.
- High-rise front collar + extended thumbhole cuffs shield your neck and hands—no more sunburn or tan lines.
Comfort-First Design for Daily Wear
- Relaxed, forgiving fit that flatters all body types—covers without looking bulky.
- Slightly elastic neckline for easy on/off—no tugging or tightness.
- Seamless flat-stitching at the collarbone for zero irritation—ideal for active days.
Feels Instantly Cooler—1.4x Above Standard
- Cooling index (Qmax) of 0.22—40% higher than national standards.
- Cool to the touch and stays that way—no stickiness, even in extreme heat.
All-Over Airflow — Breathes as You Move
- Matrix-style mesh underarms and ultra-breathable fabric—ventilation rating of 868mm/s.
- Side slits create wind tunnels as you walk—natural cooling with every step.
- Air-guiding structure forms a breeze channel between your skin and the fabric—heat escapes fast.
- Quick-dry moisture-wicking tech + grooved sweat channels absorb sweat in just 4 seconds.