On a chilly morning coffee walk around the neighborhood, the Hikas Gaiter wraps the ankles in insulation made from recycled PET and oyster shell fill. Worn inside the shoe, this insulated ankle gaiter compresses comfortably there and expands above, so the warmth sits right at the ankle. A featherweight, water-resistant shell keeps it light for everyday wear. What Our Gearhead(R) Experts Are Saying:"On cold bleachers at a Saturday game, my ankles stayed warm in sneakers because the insulation wraps right where the cold gets in. The gaiter sits inside the shoe and weighs almost nothing, so I forgot it was there until the final whistle."