Distinctive feature of the 100 sole
The 100 insole has a universal arch shape which is suitable for most feet unlike the 3 Feet models which offer 3 different arch shapes.
The 100 insole provides real benefits (support, comfort, warmth and distribution of pressure) compared with original insoles.
They are ideal for beginner to intermediate level skiers.
If you're looking for a perfect fit with your foot arch and greater precision, you should go for the 3 Feet model.