Belleville Ultralight Side-Zip Tactical Boot - Mens Black 4 Regular 040R. At the core of the new series is the PTO orthotic footbed; a proprietary load-bearing removable insert that uniquely combines the benefits of shock absorbing foam with superior arch support. The 10-40 Series is the new benchmark for light fast engineered tactical boots. Specifications for Belleville Ultralight Side-Zip Tactical Boot - Mens: Manufacturer: Belleville Gender: Male Age Group: Adults Boot Shaft Height: 7 in Shoe Height: High Boot Style: Ultralight Boot Apparel Fit: Regular Color: Black Toe Type: Soft Toe Activity: Tactical Insole Material: PTO Removable Load Bearing Orthotic Footbed Footwear Closure: Laces/Side zip Weight: 18.5 oz Seasonal/Temperature Use: Dry Weather Water Resistance Level: None Footwear Upper Fabric/Material: Air Mesh w/ Polishable Leather Toe Full Grain Leather Midsole Material: Shock Absorbing EVA Outsole Material: Dual Density Nitrile Rubber Moisture Wicking: Yes Features of Belleville Ultralight Side-Zip Tactical Boot - Mens Polyurethane-coated water resistant YKK side zipper Molded TPU heel stabilizer Athletic-style "ghilly" lacing system Highly breathable mesh side panels Moisture wicking lining Package Contents: Belleville Ultralight Side-Zip Tactical Boot - Mens Belleville TR1040-LSZ 040R: TR1040-LSZ Ultralight Side-Zip Tactical Boot - Mens Black 4 Regular