Belleville 7in Waterproof Ultra Light Side-Sip Tactical Boots - Men's Black 4.5 US/Regular 045R. 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 7in Waterproof Ultra Light Side-Sip Tactical Boots - Men's: Manufacturer: Belleville Men's Shoe Size: 4.5 US Gender: Male Age Group: Adults Boot Shaft Height: 7 in Boot Style: Tactical Boots Color: Black Toe Type: Soft Toe Activity: Tactical Outdoor Fabric/Material: Durable Leather Insole Material: PTO Removable Load Bearing Orthotic Footbed Odor Control/Anti Bacterial: No Fire Resistant: No Weight: 18.5 oz Seasonal/Temperature Use: All Seasons Insulation: Not Insulated Package Contents: Belleville 7in Waterproof Ultra Light Side-Sip Tactical Boots - Men's Belleville TR1040-ZWP 045R: 7in Waterproof Ultra Light Side-Sip Tactical Boots - Men's Black 4.5 US/Regular