Alpina ACL Action Series Cross-Country Nordic Classic Ski Boots size 43, US size 9

Alpina Action (ACL) XC boots are praised as a great value for recreational skiers, offering a comfortable, stable fit with features like a waterproof lace cover, Thinsulate lining, and an anatomical footbed for support, making them ideal for classic skiing and building confidence, though they are considered a softer-flex boot compared to high-performance models, suitable for various classic styles but excelling in comfort and progression. Color: Yellow Multi, system NNN Touring Sole, Over lace cover, Plastic heel counter for support, Speed lacing system, Thinsulate insulation for warmth. The "base sole NNN system XC boot bottom" refers to the New Nordic Norm (NNN) cross-country (XC) ski boot sole, characterized by two narrow channels/grooves on the bottom that fit onto corresponding ridges on NNN bindings, providing classic-style skiing with good power transfer and compatibility across many modern brands like Rottefella, Fischer (Turnamic), and Salomon (Prolink). This system is the dominant standard, offering stability and direct power transmission for efficient skiing. Key Features of the NNN Sole: Two Channels: Look for two shallow, parallel grooves running the length of the boot sole.