With a little help from GORE-TEX's advanced waterproof technology, you'll see exactly why MOAB stands for MOTHER OF ALL BOOTS. Durable synthetic material, a super-supportive footbed and high-traction Vibram grip deliver all the comfort and support you need on the trail.GORE-TEX waterproof membrane, exceptional breathability, and waterproof performance Leather and breathable mesh upper Bellows, closed-cell foam tongue keeps moisture and debris out Protective rubber toe cap Breathable mesh lining Merrell M Select FIT.ECO+ blended EVA contoured footbed with added zonal arch and heel support Molded nylon arch shank Merrell air cushion in the heel absorbs shock and adds stability EVA midsole for stability and comfort Vibram TC5+ sole 5mm lug depth Weight: 1lb 13oz / 810G