Dalbello?

Are the tongues on the Zipft liners thinner than the tongues on the liners that came with the boot? If they are then there could be too much room at the front of the boot (fig a.). This could have allowed your feet to slide forward until your toes made contact with the front of the boot (fig b).

Swingbeep: I still have the original liners, so I will check. Thanks for the tip. But my feeling is that the Zipfit liners are fairly chunky, with lots of leather on them, whereas the included-with-the-boot liners are more like slipper boots, but anyway I'll check it out.

It's a bit of a long shot Billip1, but on the Zipfit website http://www.zipfit.com/linertech.html Sven Coomer states "Zipfit owner and designer, Sven Coomer, made this first ever plastic reinforced and asymmetrical tongue-shell in 1972. This tongue-shell remains the best. Before the tongues were made with thick leather, foam padding and neoprene lining.
Today it's the same tongue-mold and neoprene lining. Only the (thick) foams have been replaced with the new and malleable OMfit cork and ceramic moulding composite which is proven to be the most effective and durable shin and instep protection; anatomically adaptable, while allowing the use of very thin and most sensitive tongue profiles."

One of the wonderful things about Zipfits, is the little injection points on the tongue and the liner 8)

I have had extra material squirted into the tongue and each side of the ankle.

I love my Zipfits :D