New in the box. Nike React SFB Carbon Men’s Elite Outdoor Shoes Color: Cargo Khaki/Sequoia CK9951330 Built for special operators and elite outdoor athletes, the Nike React SFB Carbon packs the durability, support and traction of a tactical boot into a rugged shoe. The full-length carbon plate helps optimize your stride, while responsive Nike React cushioning provides comfort for the long haul. Aggressive tread gives you excellent traction wherever your mission or adventure takes you.