Used indoors. The logo on the inside of the right boot is slightly worn. Reference price: ¥11,000 - Brand: Outdoor Research - Model name: Men's Tundra Slip-on Arranger Boots - Size: M (US 10-11, 28.0-29.0cm) - Material: NASA-approved insulation - Features: AEROGEL - Design: Slip-on boots Product Description OUTDOOR RESEARCH Tundra Slip-on Aerogel Booties These are low-cut slip-on socks equipped with warm, NASA-approved Aerogel. If you pack them, you can spend comfortably during snow camping, mountain climbing, or staying in a backcountry hut. They use compression-resistant PrimaLoft Aerogel, which functions as a thermal barrier between your feet and the outside air, and feature a weather-resistant outer shell and a grippy sole. VerticalX insulation provides excellent heat retention that functions even when wet. The foldable heel can be worn up or folded down to turn the booties into slippers. Size ○ Men's Outdoor Research Slip-on Outdoor shoes