Comfy as you warm up, comfy as you cool down, even comfy when you break a sweat—the women's REI Co-op lightweight long-sleeve base layer top is ideal for skiing, hiking and lunch break, too.

• 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
• Flatseam construction is comfortable against your skin
• Lower back hem stays tucked when you stretch
• UPF 50+ sun protection
• Fitted
• Fair Trade Certified™ factories promote safe working conditions and sustainable livelihoods