Some parents feel like harness of Axkid ONE is a bit tough to tighten and release. Axkid has therefore created a “low friction kit” which will take care of the issue. It will lower friction and make the harness easier to use. The kit consist of five plastic pieces and a pair of shoulder pads. If you are using an Axkid ONE, not the updated model called ONE 2, you can request the kit from your retailer free of charge.