The best protection. Adjustable strap and closure. New ergonomic cut, best dog head movement. Reflective tape, maximum visibility. GPS collar passage. Eight-layer materiel: One layer of Cordura 1100 to protect against brambles and tears, Four layers of Dyneema to protect against punctures and bites, Two temperature-control layers for breathability and optimal venting, One layer of soft fabrics for comfort and less friction. High strength thread,higher grammage and cross stitching to reinforce the solidity YKK zips, reinforced durability. Size adjustment kit included.