The upper of this Rocky BlizzardStalker is constructed with a combination of split suede and 900 Denier fabric. The collar has been padded with molded foam; its comfort will surpass all of your expectations. The extended tongue serves as a buffer, it stops objects from getting down into the interior. The boot's lace-up design completes the upper.A steel toe ensures that these BlizzardStalker boots will keep your feet out of harm's way. It's able to withstand up to 75 lbs. of impact and compression, we know this because it has met the ASTM F2413-05 I/75 C/75 Protective Toe Classification. These 9" work boots also meet the requirements of the ASTM Electrical Hazard Standard.They have been assembled with Rocky waterproof construction. Then there is the 1200 Grams of Thinsulate Ultra Insulation that will provide unparalleled warmth. Within the interior there is a polyurethane footbed. This footwear also has a TPU heel stabilizer, this comfortable feature will support your feet as you are walking.