Thermal 2mm Swim Hat / Diving Hood Key benefits Keeps your head warm in cold water by reducing heat loss from the top of the head, ears, and neck. Provides close-fitting, ergonomic coverage that stays comfortable during activity and reduces chafing. Adds protection for the head from minor impacts and abrasions while in the water. Features 2mm thermal construction for a balance of warmth and mobility. Designed to cover the top of the head, ears, and neck for full cold-water protection. Ergonomically cut for a snug, comfortable fit that follows head contours and stays in place during movement. Suitable for repeated use in cold-water conditions; durable construction for active water sports. How this solves common problems Cold water discomfort: The thermal 2mm build keeps core head temperature steadier so you can stay in the water longer with less heat loss. Exposure of ears and neck: Extended coverage protects vulnerable areas from cold, wind, and spray. Fit and movement: The ergonomic cut and close fit minimize water flushing and shifting while you swim, surf, dive, or paddle. Use scenarios Winter open-water swimming: Wear for cold-weather swims to maintain warmth around the head and neck. Surfing or paddling in cool conditions: Keeps ears and neck protected from wind and spray while allowing head mobility. Cold-water diving or rafting: Provides thermal protection and a close fit under helmets or other headgear to reduce heat loss and abrasion. Materials and performance 2mm thermal construction delivers a practical balance of insulation and flexibility for active water use. Close-fitting design minimizes water exchange and improves heat retention without restricting movement. Fit and care Ergonomically cut to fit closely over the head, ears, and neck. Follow standard sizing guidance where provided. Rinse after use and air dry away from direct heat to preserve the material and fit. Suitable activities Winter swimming, surfing, diving, rafting, and other cold-water sports where head warmth and protection are needed.