DS(8) is very slim waisted. He also likes really comfy trousers (not jeans, chinos, cords etc. but joggers/leggings kinds of things). Drawstring waists on joggers don't really work and this kind of trousers doesn't have loops for belts.. School trousers are fine because they have those elastic-and-buttons inside to adjust the waist size. He has one pair of leggings kind of things with this arrangement, that we just happened to find in TXMaxx but of course there was only one of them. Does anyone else happen to know where you can buy soft comfy trousers with these waistbands? At the moment he's mostly wearing age 5 joggers then end just below his knees!