Boot heel slipping.

I have the Crispi Lapponia and I find that actually tying them looser helps prevent blisters for me, if I’m gonna be side hilling or something I’ll tighten them, but just on the trail I keep them loose. I tend to wear out the heel in my regular shoes and came across the article and I think it helps answer why I get blisters more easily.

 
I have skinny feet, I often stack insoles to get the boots to tighten on my feet better. This has helped with all of my boots.

I also stack the extra cushion is nice jumping off of things especially at work.
 
Did another 5 miles…..what I adjusted-

Heavier sock (still used a liner)

Used the factory crispi insoles

Tightened laces (heel lock) at the bend in foot

Results

Definitely less heel slip, but some pain / discomfort at bend in foot (front of ankle), overall not bad for a stiff mountain boot, but not the most comfortable I’ve had either.
 
Did another 5 miles…..what I adjusted-

Heavier sock (still used a liner)

Used the factory crispi insoles

Tightened laces (heel lock) at the bend in foot

Results

Definitely less heel slip, but some pain / discomfort at bend in foot (front of ankle), overall not bad for a stiff mountain boot, but not the most comfortable I’ve had either.
As someone said above, are you 100% sure you have the right size? This is a whole lot of work to take up space in a boot that probably shouldn't be there to begin with.
 
My rule of thumb on boots is I loosen boots and slide my foot all the way forward. I slide my finger behind my heel to check space, if the finger slides easy or has space boots are too big.
 
Try simple dense foam heel wedges beneath your insoles, combined with the instep heel lock lacing method. The wedges help take up space in the heel of the boot and reduce upwards slip if the heel pocket is slightly too tall for your calcaneous bone.

A sock with dense heel padding (e.g. Hiker full cushion type) may also help reduce space in the heel pocket.
 
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