lace-up closure? GORE TEX – The upper technology is waterproof not just resistant. It guarantees no leaks and delivers superb protection against streams and deep snow, keeping your feet comfortable and dry for longer? GRAPHENE OUTSOLE – Using graphene we have developed outsole rubbers that are scientifically proven to be 50% stronger, 50% more elastic and 50% harder wearing than our standard outsoles. Combined with 6mm claw shaped cleats to provide great traction over snow and ice.? LIGHTWEIGHT – Lighter and more comfortable that other leading brands, making the shoe super comfortable for longer hikes.? SIZE NOTE – The shoes come up a 3 on our fit scale (1 narrow – 5 wide).