How do I loosen the Fllo harness? Clek January 14, 2021 21:21 Updated Follow While lifting up on harness adjuster tab, pull out on the shoulder harness straps. Related articles Video Manual (US) - Installing Fllo Rear-Facing How do I adjust the Fllo's Shoulder Harness Straps? Download Owner's Manuals for Fllo Video Manual (US) - Installing Fllo Forward-Facing How do I check that my child is properly harnessed in the Fllo when forward facing? Comments 0 comments Article is closed for comments.