Under Armour HeatGear men's compression long sleeve shirt, castlerock/white

The Under Armour HeatGear® Men's Compression Long Sleeve is a performance baselayer built for athletes who train hard in hot conditions and need full arm coverage without added bulk. Its ultra-light HeatGear® fabric delivers a compressive, second-skin fit that stays locked in place through every explosive movement – on the golf course, in the gym, or under pads on the field. Whether you layer it beneath a jersey or wear it as a standalone training top, this shirt is engineered to keep you cool, dry, and focused when temperatures rise.

• Ultra-light HeatGear® fabric – delivers superior coverage without weighing you down, so you can move freely at full speed.
• Advanced moisture management – fabric wicks sweat away from the skin and dries rapidly to keep you comfortable in the heat.
• Mesh underarm & back panels – strategically placed ventilation zones allow airflow exactly where you need it most.
• Compression fit – ultra-tight, second-skin construction squeezes and supports muscles, helping you feel powerful and locked in.
• Hybrid raglan sleeve construction – engineered for an extended range of motion and all-day comfort through every swing or rep.
• Ergonomic seam placement – seams are kept away from high-abrasion areas to maximise durability and reduce irritation.
• Write-in locker tag – personalise the back-of-neck tag with your initials or number for easy identification in a team environment.

HeatGear® Technology – Cool Under Pressure

HeatGear® fabric is engineered specifically for hot-weather performance. Its tight, compressive weave wicks perspiration away from the skin and disperses it across the surface of the fabric for rapid evaporation – keeping you feeling light, dry, and cool even when the temperature climbs.

Locked-In Fit & Freedom of Movement

The hybrid raglan sleeve construction paired with 4-way stretch HeatGear® fabric means the shirt moves with your body, not against it. Whether you are driving through a golf swing or powering through a sprint, the compression fit grips your muscles and stays in place without restricting motion.

Versatile Baselayer or Training Top

Designed to be worn solo as a training shirt or layered under a jersey or sports pads, the HeatGear® Long Sleeve adapts to your activity. Its low-profile compression silhouette sits flat under outerwear, making it the ideal first layer for golfers adding an extra arm layer on cool early mornings.

Strategic Ventilation

Mesh panels positioned at the underarms and across the back provide targeted breathability in the highest heat zones. This zoned approach to ventilation ensures maximum airflow without compromising the shirt's supportive compression structure.