Caterpillar Threshold Waterproof Work Boot Men's CAT Footwear. Cat boots are built to protect. Whether it is protection from slipping, falling objects or wet feet we will have you covered. The Threshold Waterproof work boot is made with seamed seals for water protection, an incredibly slip resistant outsole that exceeds ASTM standards and full grain leather for extreme abrasion resistance. All this and a great value makes this boot hard to beat, literally. Waterproof. EH. Slip Resistant. ERGO Technology.