Martingale bib collar Week-Collection Jump The martingale bib with Jump’In collar is attached to the bib with a carabiner. It offers a fixed frame thanks to the soft leather part. The entire Week range is made from very high quality full grain English leather from SEGWICK. The buckles are made of stainless steel and the finishes are neat. Available in mahogany, tan, black and tobacco. Solo in full (but there are many configurations available and this martingale may be suitable even for large and small horses)