The adidas TERREX MULTI HALF-ZIP T-shirt provides comfort on hikes, mountain climbs, and casual walks. You can wear it on its own or as a base layer under a jacket. The AEROREADY absorbent material will keep you dry. The shirt features comfortable shoulder seams that won't cause discomfort, even when carrying a backpack. The extended back covers your lumbar. Underarm gussets provide unrestricted shoulder movement.