This International Standard specifies the dimensions and characteristics of the interface, requirements, test methods and marking of Telemark ski-boots with flexible sole which are used with current systems of telemark ski-bindings with attachment at the boot toe and boot heel, the proper function of which depends on the dimensions and design of the interfaces. For Telemark ski-binding systems that function irrespective of the sole shape or that have different requirements for the sole dimensions, it is not always necessary for the Telemark ski-boot soles to comply with this International Standard in order to achieve the desired degree of safety. It applies to Telemark ski-boots of sizes 15,0 and larger in the mondopoint system (see Annex A).