Blundstone Sheepskin FootbedsStretch your Blundstone season, and your footwear dollar, into the chilliest months with these natural Merino wool footbeds Sizing made for Women (W) and Men (M) 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