Reiss Boys Slim Elasticated Waist Joggers (3-14 Yrs) - 3-4 Y - Blue - Available at M&S
These understated joggers by Reiss are crafted from merino wool-rich yarn for a comfortable feel. They're cut in a slim fit to create a streamlined aesthetic, with neat ribbed trims. An elasticated waist gives easy movement all day. The pair features two side pockets, so children can store their essentials.