The Georgia Boot Men's 11 in. Pull-On Muddog Comfort Core Work Boots bring the comfort of all day wear with a tough, durable construction. These pull on work boots are made them from the toughest materials, such as SPR™ leather. Compared to traditional leather, SPR leather of these lightweight work boots is roughly 3 times as strong and resists abrasions 2.5 times as well. It stands up to organic chemicals and acids due to a rare blend of proprietary materials. The rubber Phoenix outsole of these light work boots also is hard-working; it resists chemicals, oils, and slips. It's non-marking and provides flexibility and cushioning.