Here's what other sites are saying:
Scarpa Spirit 4 touring boots are built to take you up, down and across any terrain that you want to challenge. These boots fit the Dynafit binding system to optimize tour prowess without compromising weight or touring control, but they'll also work perfectly in all alpine touring binding systems.
- Mountain Gear
CLOSEOUTS . Scarpa Spirit 4 AT ski boots offer superb, all-around performance in any conditions, and feature Intuition Precision High thermo-moldable liners for amazing fit and comfort. Pebax(R) high-performance thermoplastic resin shell maintains flex in cold conditions Compatible with Dynafit binding system Intuition Precisions thermo-moldable liner for a totally custom fit Includes interchangeable super-stiff ski tongue and hinged tour tongue AEGIS(R) Microbe Shield treated to fight bacteria and odor Ski-walk mechanism Lateral canting adjustment Four easy-locking buckles with power strap Hook-and-loop power strap Compatible with all alpine touring bindings, including Dynafit(R) Forward lean: Settings range from 19-23 degrees Height: 12" Weight: 9 lb. 6 oz. pr. By Scarpa of Italy Made in Italy Available Colors: LEMON. Sizes: 24.5, 25, 25.5, 26, 26.5, 27, 28, 28.5, 29, 29.5, 30, 30.5, 31.
- Sierra Trading Post
The Scarpa Spirit 4 is a step above the rest. It powerfully blends modern, high-performance freeride and classic alpine touring. With an additional buckle and a higher cuff, you get the power and support you need no matter how aggressively you ski. The Spirit 4 also sports the Intuition liner that will give you the comfort you need on those long days. The Spirit 4 is compatible with Dynafit bindings.
The Scarpa Men's Spirit 4 Alpine Touring Boots blend freeride performance with classic alpine touring weight and comfort and are compatible with all AT bindings, including Dynafit. This freeride-oriented AT boot uses four buckles and a dual-density shell for optimum power transmission yet includes a hinged tongue for easy forward-flex while touring. Scarpa gave the Spirit 4 Boot a heel retention system for solid heel hold. For the really steep stuff, swap out the regular tongue for the included, super stiff ski tongue and experience even more driving power. Scarpa's Intuition Precision High inner boot uses medical-orthotic foam for a super comfy, supportive fit.