Lightweight Base Layer Half-Zip Top

The women's REI Co-op lightweight half-zip base layer top wicks and breathes to keep you comfortable hiking or skiing as you go from cold to warm to overheated and back. 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 Fair Trade Certified‚Ñ¢ factories promote safe working conditions and sustainable livelihoods