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The Atomic Revent GT AMID Helmet sits at the top of Atomic's all-mountain helmet range, built around AMID 360, the rotational impact protection system aimed at angled hits rather than only direct ones. Construction is hybrid: an ABS hard shell over the upper for durability with an in-mold lower section to keep weight down. Live Fit and a height-adjustable fit system dial the shape to the head without pressure points, and a magnetic Fidlock buckle closes with a mitt on. Adjustable venting opens and closes by hand. A merino blend lining handles temperature and odor. Unisex sizing.