The Hot Chillys Women's Clima-Tek Crewneck Base Layer Top delivers soft, breathable comfort with technical performance for outdoor adventures and everyday wear. Its polyester-spandex construction provides four-way stretch that moves with the body while maintaining a comfortable, streamlined feel. Moisture Transfer Fibers use hydrophobic yarns to move moisture away from the skin, helping keep the wearer dry and comfortable across changing temperatures. Activated carbon incorporated into the yarns enhances thermal regulation and odor-blocking performance. A classic crew neckline, raglan sleeves, and flatlock seams create a comfortable design with unrestricted movement and reduced chafing. With UPF 30 protection, hidden thumbhole loops, and a relaxed fit, this midweight base layer works equally well under a shell or on its own.