What Our Gearhead(R) Experts Are Saying: "This is my go-to for long days in the sun. The UPF 50+ protection gives solid coverage, and the HeiQ Smart Temp tech really helps when temperatures spike. I like the tunic length for extra coverage, plus the thumbholes and hood make it easy to adapt on breezy ridgelines or by the water."When summer stretches long and the sun hangs high above alpine lakes, we slip into the Hylas Long-Sleeve Tunic and stay out a little longer. STIO crafted this lightweight layer with majority-recycled reHelion(TM) fabric that feels airy, soft, and ready for sun-drenched days in the mountains. The four-way stretch construction moves effortlessly on hikes and shoreline wanderings, while UPF 50+ protection shields us from intense rays. HeiQ Smart Temp technology activates as our body heat rises, helping regulate temperature, and HeiQ Fresh treatment keeps odor in check through multi-day adventures. A fixed hood and thumbholes provide thoughtful coverage, and the longer tunic silhouette offers extra comfort when layering over swimwear or leggings. Easygoing yet technical, it's a warm-weather essential built for sun, water, and trail.