K1 P1. knitted backpack

Got the base of the rucksack knitted and moved onto the ribbing for the back, decided to include a few rows of heel st every so often up the back. 1*1 rib for 3 fingers(2") then 5 rows of heel st. It will give the bag some strength and integrity. Its coming along nicely, only problem is the cotton yarn is rubbing against my finger pretty bad.I knit way too tight, after doing the jumper I had thought I'd gotten looser.The jumpers another post I'll do soon, do have pics of that already. Still thinking on the front but will probably be k3 p1 rib unless I change my mind which is a real possibility.