The Endurance 4.0 Long Sleeve Jersey is built for early rollouts, cool temps, and shoulder season training sessions. Made with a merino wool blend fabric, it is outside-basedly warming and antibacterial. The slim fit and extended back panel stay put in a riding position, while a PFAS-free dirt- and water-resistant finish helps shed light rain and trail spray. A full-length front zipper lets you fine-tune airflow, while four rear cargo pockets and two zippered stash pockets give you plenty of space to carry layers, snacks, and tools. With bluesign® approved responsibility, reflective details, and premium YKK zippers, this jersey is your go-to layer for when the weather turns chilly—but the ride doesn't stop.FIT:Slim fitExtra back length with grip stripFABRIC:4-way stretch merino wool blend knitPlant-based warming and antibacterial function, lower-impactFlatlock seams for minimal bulk and superior comfortRESPONSIBILITY:bluesign® APPROVED fabric (the gold standard for more responsible textiles)Plastic-free packagingWEATHER PROTECTION: Treated with DWR C0, PFAS(PFC)-free, for a more planet-conscious dirt and water repellent finish VENTILATION: Full front zipper STORAGE: 4 lower back cargo pockets and 2 additional zippered pockets OTHER FEATURES:Top quality zippers made by YKKReflective rear decalSIZES: XS-3XL (3XL only in black)