Stretch your Blundstone season, and your footwear dollar, into the chilliest months with these natural Merino wool footbeds. These insoles are a "must" for Canada. Natural wool retains heat, wicks moisture and lets feet "breathe." It's like a getting new pair of boots, and extra months of warm comfort, for the price of a footbed. (Wool footbeds included in the purchase of all styles of our Blundstone Winter Thermal boots.) Highly recommended. Full sizes only. Please note: These are not compatible with our Work & Safety Boots. PLEASE NOTE THAT THE SIZING LISTED IS IN NORTH AMERICAN SIZING