The B3 AB is a 100% composite one-piece design with that legendary COMBAT feel and BBCOR performance

Foot-forming 4D Foam® footbed molds to the foot for a locked in

THERMOS vacuum insulation for maximum temperature retention

It has the 2 5/8" Barrel diameter

Used Merrell Men's Moab 2 Mid Waterproof Hiking Boot Size 10.5 Earth 10.5:Earth The B3 AB is aLightly Used (see pictures) 100% Suede Leather Mesh Imported Synthetic sole M Select DRY seals out water and lets moisture escape so you stay dry when you're on the move Performance suede leather and mesh upper; Molded nylon arch shank Bellows, closed cell foam tongue keeps moisture and debris out. Merrell air cushion in the heel absorbs shock and adds stability, 5mm lug depth Protective rubber toe cap, Breathable mesh lining Vibram TC5+ sole, 5mm lug