Dual BOA closure locks in your forefoot and controls upper stability independently Dual-density Intuition foam for moderate support and a soft flex Lined with micro fleece for superior warmth and comfort 100% heat-formable for a customized fit The Thirty Two STW Double BOA Boot has the same great comfort and easy flex but now with zonal lockdown control. Dual BOA Closure System allows you to lock in your forefoot and control upper stability independently.Comfort Fit – Constructed with dual-density intuition foam allowing for moderate support and a soft flex. Lined with micro fleece for superior warmth and comfort. 100% heat-formable for a customized fit.. 1:1 Lasting with True Half Sizes. Dual BOA Closure System. STI Evolution Foam Outsole. 3D formed Tongue for Even Flex. Internal Lacing System. Heel Hold System. Comfort formed Footbed. Soft Flex: 3/10