them boxes look top notch but they will suck the heat right out of a dog whos already wet cold nackerd and injured after time toground aluminiums the biggest conductor of cold ied make sure ther was a old coat or a a lineing in ther so the dogs not sat on bare meatal losing all his heat going from hot with a sweat on to very cold is dangerous for us and are dogs ,,, they look well made tho mate