Xtenex (indeXed-TENsioning-nEXus) is a worldwide patented lace technology that produces adjustable tensioning between shoe eyelets. This technology addresses the source of footwear related pain and discomfort: lace migration. Lace migration is the gradual movement of the shoe lace toward the forward bend of a shoe, which causes two main problems: Binding; a tightening and restricting pressure at the top of the shoe. This can lead to foot fatigue, pain, numbness and restriction of natural foot swelling. It loosens the fit around the footwear's metatarsal area, which causes increased slipping and reduction of forward foot stabilization. This can produce heat friction, which often leads to painful blisters.The unique design of the Xtenex lacing system solves the problem of lace migration. Xtenex laces have an elastic core and a series of knots along the entire length of the lace at consistent length intervals. Stretch the lace and the knots disappar, allowing you to thread the lace through the eyelets. Release the tension and the knots reappear. More knots between eyelets lessens the tension; fewer knots between eyelets increases tension. This technology enhance footwear fit, comfort and performance through its many advantages:The Xtenex Lace expands during natural foot swelling and eliminates foot compressionThe lace does not slip - the knots maintain the original fit by restricting involuntary lace movement through they eyelets; increasing comfort and keeping the foot stable in the foot bedNo plastic pieces are neededEliminates "dual-compression" impactA lace shoe is made into a slip-on - Never tie your shoe again!Asymmetrical lacing - the shoe upper can be molded to the natural non-symmetric form of
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