Sprenger Satinox 14mm Single Jointed Stainless Steel D Ring 8.5 The DefenceX Shield Sport Air Trousers The DefenceX Shield Sport Air Cooler is crafted from two unique fabrics a lightweight textured sports mesh weave and an air mesh to offer ultimate ventilation 1680 Denier nylon upper is tough and durable Sprenger 40925 Satinox single jointed D RingThe D ring is 90mm and the side bars give you more lateral supportergonomic shape enables even pressure distribution on the tonguelies anatomically correctly between the tongue and palatal archallows direct pressure transmission on the tongue and lower jaw due to the fixed cheeks and gentle pressure on the polllies steady in the horse's mouth gentle on the corners of the mouththe lateral contact helps horses that tend to fall out whilst riding or approaching an obstacle