REI Ruckpack 28 (https://www.rei.com/product/118790/rei-co-op-ruckpack-28-pack https://www.rei.com/product/118790/rei-co-op-ruckpack-28-pac...) I bike commute

REI Ruckpack 28 (https://www.rei.com/product/118790/rei-co-op-ruckpack-28-pack https://www.rei.com/product/118790/rei-co-op-ruckpack-28-pac...) I bike commute with it every time, sometimes with a laptop, and it is wonderful. I really enjoy that it sits on my back comfortably while pedaling and has enough venting to not leave me crazy sweaty.