REI Heavyweight Quarter-Zip Top
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Our warmest REI-brand base layer, the women's REI Heavyweight Quarter-Zip long underwear top is perfect for hiking, skiing, snowshoeing, mountaineering or cross-country skiing. Heavyweight polyester/spandex fabric wicks moisture and dries rapidly; zip front provides ventilation options. Soft fabric offers 4-way stretch for ease of movement and UPF 50+ sun protection. The women's REI Heavyweight Quarter-Zip long underwear top features nonchafing flat seams and a smooth outer surface which makes it easy to layer under other clothing.