REI Lightweight MTS Long-Sleeve Zip-T - Tall - Men's

This lightweight underwear top can be worn alone or used as a performance insulation layer. Quick-drying polyester fabric wicks moisture away from your skin. Deep center front zipper allows ventilation control; features an inner draft flap and locking zipper head. Collar features two layers of fabric, ensuring the moisture-wicking surface is next to skin. Loose fit with two-way comfort stretch. Dropped back hem stays tucked in. Flatseam construction is soft and non-chafing next to skin. Fabric provides UPF 50+ sun protection, shielding skin from harmful ultraviolet rays.