u/Rawarchitecture

Hi all. Anyone using a Whippa Colo 55 and having issues with back ventilation? Very happy in most respects. The pack is super comfortable and extremely well balanced but I’m finding there is zero airflow on my back and I’m generating a lot of sweat in that area. It’s enough that I have serious concerns about taking it out in the cold as my back is just soaking after a few hours on the trail. Anyone had this issue and any luck in moulding or modifying the frame sheet to help with airflow?