The sis endurance pack packs the the best bits of sis endurance products to give you the ultimate pack that will keep you energised at all stages of your ride this pack has drinks gels and bars to make you prepared for anything and all can be transported quite easily for nutrition on the go the rego drink power is ideal for mixing in the free sis bottle and with measuring units on the side it is easier than ever before to get the perfect mixutre the mini go bars of the science in sport endur