Looking to buy custom orthotics? Can't spend hundreds of dollars on them? Feet get cold easily? Well, then Superfeet Merino Footbeds are the answer. These insoles are our most popular Trim-to-Fit insole for winter. They have the most features built in, for maximum support, balance and shock absorption. Skinny Skis has had great success with these insoles in a variety of footwear from trail running shoes to high performance skate boots. With merino wool for maximum temperature regulation and warmth in the winter.