Orvis Boa Pivot Wading Boot - Rubber. I've (Dave Hise) been field testing these boots for the last year and a half. They offer superb traction, comfort, and durability. In fact, they are the best boots Ive worn in 35 years of tredging through the rocky rivers and streams of the world. The Boa® Closure System teams an exceptionally durable and lightweight reel with aircraft grade stainless steel laces to provide for a secure, comfortable, and truly customizeable fit. Just turn the dial to achieve the desired fit; to take the boot off, simply pull the dial out until it clicks and then pull the tongue forward. The boot's upper is a highly durable and proven synthetic microfiber. Scratch rubber provides enhanced sidewall and heel protection, and a molded rubber toe cap provides great protection from rocks and adds to overall durability. An injection-molded EVA midsole creates a secure and comfortable footbed to cushion each step and prolong your day on the water. An exciting Orvis proprietary outsole provides stellar traction in a wide variety of aquatic environments-dual-durometer Vibram rubber and a proprietary Orvis lug pattern mean these new outsoles came to play. Orvis PosiGrip Screw In Studs are optional if an added level of traction is desired. Size 10 weighs in at 3 lbs. 6 oz..