DiamondCool Men’s Cooling Long Sleeve Performance Shirt - UPF 50+ Sun Protection

Full-Coverage Arm Protection Without the Heat Trapped Inside

Get the total sun defense of a long sleeve with the refreshing feel of air conditioning. The DiamondCool Men’s Cooling Long Sleeve Performance Shirt is designed for high-endurance athletes and outdoor professionals who need full arm coverage but refuse to overheat. It’s light, unrestricted, and actively fights the summer sun.

Patented 58°F Thermal-Drop Technology

Stop wearing heavy layers that turn into sweat-boxes. Our patented cooling fabric uses an advanced, chemical-free technology activated entirely by moisture. The moment you break a sweat or mist the shirt with water, the fabric fibers drop as low as a chilling 58°F (14°C), lowering your skin temperature and keeping your stamina locked in.

Certified All-Day Sun Defense (UPF 50+)

Block out the burn. With a certified UPF 50+ rating, this performance shirt acts as a permanent shield, deflecting 98% of damaging UVA and UVB rays. Enjoy total arm, chest, and back protection during long trail runs, open-water paddles, or back-to-back shifts under the direct sun.

Eco-Friendly, American-Made Engineering

• Repreve® Sustainable Fabric: Knit from recycled plastic bottles, our premium eco-fiber helps clear waste from global waterways while providing an incredibly smooth, durable, and lightweight fit.
• Crafted Domestically: Proudly cut and sewn In the USA from premium imported components, guaranteeing elite athletic stitching that won't give out during intense movement.

Technical Features & Benefits

• Instant Activation: Fabric drops as low as 58°F when damp with sweat or water.
• Maximum UV Block: Non-chemical, permanent UPF 50+ protection.
• Sustainable Quality: 88% Repreve recycled performance polyester.
• Zero-Distraction Fit: Classic crewneck cut designed to move seamlessly without chafing.
• Anti-Odor Defense: Natural antimicrobial properties prevent post-workout odor.
• Origin: Made in the USA of imported fabric.

DIAMONDCOOL ORDER TURNAROUND TIMES

Diamondcool products are currently made to order from scratch. Cut and Sew production takes about 8-12 days. Printed, Sewn and Shipped from So. California.

REFUSED SHIPMENTS

Refused shipments are subject to a 25% restocking fee. You will be responsible for shipping costs incurred by Vertical Athletics. The shipping addresses are printed as you have entered at checkout so please check to make sure it is a valid address.