Humid hike on tap? You'll be ready for the tough trails and weather ahead in the semifitted Lykken Short-Sleeve Shirt. The Nanowick technology in this shirt means extra moisture wicking when the temperature climbs. while the quick-drying polyester Marmot UpCycle® polyester uses post-consumer plastic bottles as part of our eco-conscious Marmot X Thread International collaboration. If the sun starts beating down during your trek, the UPF-50 fabric will protect you from its harmful rays. Lightweight, breathable, and packable, this will be a go-to shirt for your next trip.