My son went from wearing a size 4/6 to size 11 overnight! All his pants & sleeves are too short! We filled 2 garbage bags with clothing he had been wearing for years. So I kind of have no choice to get my sewjo and creative juices flowing; which have disappeared in the last 3/4 months in case you were wondering where I had disappeared too! The real reason I am posting this, is that I need your help ( clearly i have forgotten everything) the main fabric is this lion fleece( not to thick) and I am not sure if this thin French terry will be to flimsy for the sleeve and "rib" for the collar, hem and cuffs. Also it has no stretch! Umm maybe I could interface it or should I just use some other fleece I have and not take a chance. Help please!