Just like the name implies, the ZipFit Workhorse Liners are designed for the skier who spends pretty much every snowy day in their boots, whether it be working on the hill, recreating, or a combination of both. Burly leather construction - with the leather sourced from the same tannery that supplies Ferrari - adds to the already legendary durability of Zipfit's more established liners, and the amount of OMFit cork is on a par with the HV Gara (in other words, thick) so the liner is suitable for medium to high volume boots that you can actually stand to wear all day. As with other Zipfit products, the amount of OMFit can be adjusted by the user to dial in the perfect fit, with pockets in the tongue, ankles, and Achilles regions kept separate. Insulated in the toebox with Merino Wool and Thinsulate® synthetic insulation for comfort on the cold days, and with a fluted cuff to accommodate larger "pro" style calves, the Workhorse should last for several pairs of boots if properly cared for.