The Rab Force LS Zip is a high-performance long-sleeve technical layer specifically engineered for mountain athletes who need to balance skin coverage with thermal regulation. Constructed from Dryflo Solar double jersey fabric, this 125gsm polyester knit is designed to excel in high-intensity scenarios under direct sunlight. The primary objective of the Force LS Zip is to provide a reliable barrier against UV radiation, boasting a UPF 40+ rating that makes it an essential piece for high-altitude trekking or summer alpine climbing. Its breathable, moisture-wicking properties ensure that even when the tempo increases in hot weather, you remain dry and comfortable. The "casual fit" strikes a perfect middle ground, offering enough airflow to prevent overheating while maintaining a sleek, athletic silhouette for active use.

Featuring a deep centre front zip that allows for rapid venting when working hard on steep ascents. To ensure long-term freshness during multi-day expeditions, the fabric is treated with an effective odour control finish, reducing the need for frequent washing. Comfort is further enhanced by low-profile seams throughout the garment, which eliminate chafing when worn under a heavy pack or climbing harness. Practical details include integrated thumb openings to keep the sleeves securely in place and provide extra back-of-hand protection, while the 174g weight makes it a negligible addition to any kit list. Whether used as a standalone sun shirt or a technical base layer, it is a robust and dependable choice for any outdoor enthusiast.

Rab LS Zip Features

• Dryflo Solar Double Jersey Fabric (125gsm) with UPF40+ protection
• Wicking with odour control treatment
• Lightweight deep centre front zip for enhanced venting
• Overlocked low-profile seams for next-to-skin comfort
• Integrated thumb opening

Fit: Regular
Centre back length(SizeM): 71cm / 27.9inch
Weight: 174g