DOCO Signature H-Harness (DCSN201)Special Features 100% high quality single-ply nylonHeavy duty stitching for long lasting qualityHigher tensile strength than polyesterNylon is resistance to mildew, aging and abrasionLess pressure on the chest and neckHeavy duty two D-RingsDurable plastic side buckleTri-glide for easy size adjustmentVibrant colors are easy to see at all times Size Chart