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The Hot Chillys Waffle XLS Midweight Crew is engineered for the active outdoor enthusiast, offering warm comfort for a wide range of activities. Moisture Transfer Fibers move moisture away from the body to maximize comfort, and wafflelike texture of fabric feels comfortable against skin. Permanent, natural antimicrobial finish helps control odors; finish is derived from a biodegradable element of crustacean shells. Relaxed fit and anatomic design promote freedom of movement. Fold-over mitts keep your hands warm and cozy. Flatseam construction is soft and non-chafing next to skin.