Recommended for: mild weather alpine climbing, glacier travel, and carrying heavy loads. We&';ve updated our popular guide boot with improved ankle flex for even better hiking comfort. It&';s an ideal boot for moderate spring mountaineering routes or long approaches with a heavy load. The thin, lower profile sole is designed for precise terrain feel and is combination crampon-compatible. Featuring a durably waterproof/breathable GORE-TEX lining to protect feet from the elements.