The Xlab Mezzo Cage Pod is a hard plastic storage container made with durable high density polypropylene material. It fits conveniently in a standard water bottle cage. The Mezzo Pod fits all Xlab cages and matches perfectly with the Xlab cage groove to prevent launching. Included with the pod is a micro fleece bag that protects the contents and muffles noise. It is completely water proof and will keep stored items clean and dry. It has plenty of room to fit a tubular tire, pit stop inflator (or a tube and levers) and a multi-tool so it can replace the traditional saddle bag.