Don't get cold feet. Take on cold-weather projects with confidence in the Yaktrax Thermal Insoles. Several layers of proven technology deliver utterly amazing warmth so your feet stay toasty every time. The blended woolen felt layer maximizes warmth, while a recycled blended felt layer locks out moisture with extraordinary wicking capabilities. Add in a Radiantex layer to redirect heat back to the feet, and the Yaktrax Thermal Insoles are the clear choice. Renewable, environmentally friendly, and with just the right amount of cushioning, these insoles won't fray or give out when you need them most. They're among the best thermal insoles you'll ever find. Trim to fit. Fits ladies' size 5 through men's size 13. Wear felt side up. Hand wash, air dry. Imported. Manufacturer model #: 08309. Superior thermal insulation Radiantex layer redirects heat back to feet Blended woolen felt maximizes warmth Recycled blended felt locks out moisture Superb cushioning Extraordinary wicking capabilities Renewable and environmentally friendly resource Won't fray