REI medium weight 1/2 zip base layer

Features Made of a soft polyester blend that wicks sweat and dries fast to keep you warm in winter and cool in summer Spandex in the blend gives the fabric 4-way stretch, while underarm gussets ensure you can reach and move with ease High neck coverage with a half-zip front lets you open up for venting when you're working hard Flatseam construction is comfortable against your skin Lower back hem stays tucked when you stretch UPF 50+ sun protection Fitted From nonsmoking home with pets. 19" A to A 28" length in back