Rosie, Ski Technician at Profeet and a previous owner of last season’s Mach 1 thinks :
“It gives a far better ankle and lower leg hold. Anatomical women have smaller calves and therefore struggle with the way ski boots can fit. The new update should give many more people a more concise fit.”
The stiffer flexes (130 and 120) in the Mach 1 are made from polyether (softer flexes polyester shell and polyolefin cuff) to aid strength.
The 130 has carbon inserts in the spine for that extra stiffness. The 120 has fibreglass, 110 plastic insert.