Propa Liner Sleeve

The Propa Liner Sleeve is a simple but highly effective way to tighten ski boot fit and restore performance—without replacing your liners or boots.

Designed to sit over your liner (between liner and shell), it compresses the foam around your foot, reducing excess space and dramatically improving heel hold. The result is a more locked-in feel, better energy transfer, and less need to overtighten buckles.

It’s especially effective in boots where the liner has started to pack out, or for skiers with lower volume feet who struggle to achieve a snug fit. Unlike most quick fixes, the Liner Sleeve is also tuneable, allowing you to adjust fit further with added foam where needed.

This is one of those upgrades that feels small—but on snow, it makes a very noticeable difference in control and connection.

Key Features

• Improves heel hold by compressing liner foam around ankle and heel
• Reduces excess volume inside the boot for a tighter, more responsive fit
• Restores performance in packed-out liners without replacing them
• Tuneable fit system with the ability to add or adjust foam placement
• Simple install – slides over liner with no permanent modification
• Reduces need to overtighten buckles, improving comfort and circulation
• Lightweight neoprene construction that works with most alpine boots

Bottom line

If your boots feel loose, sloppy, or less responsive than they should,
this is one of the fastest and most effective ways to bring them back to life.