- Navy blue knitted pants for boy - Two side pockets, one welt pocket back - Exclusive IKKS tennis stripe pattern - Loose fit, waist loops - Elasticated waist with knotted drawstrings Shop the matching jacket From the city stadium to the sofa, via guitar lessons, the idea is to keep him in the same outfit, from morning to night. The tennis-striped jogger pants are a no-brainer in terms of style and comfort.