The Alpina T10 Cross-country Touring Boot adds a zippered lace cover for added warmth and protection to the popular T5 model. With Thinsulate brand insulation for added warmth, a comfortable anatomical foot bed, zippered lace cover and a PU coat d upper, the T10 is Alpina's most popular Touring boot and is perfect for a day on the trails. The Rottefella NNN T4 sole is compatible with NNN bindings and works particularly well when coupled with a Rottefella Touring Auto binding.