I can’t seem to do it up

[Kitfoxdave]

Care to elaborate?

Removed the underside snap portions... and sewed in velcro strips 1-1/2 " wide about 7 inches long... mine shrunk when I washed it in cold water, hung out to dry... Hope this helps you out. Very adjustable too if you start to change weight... up or down....

Left the outside snap portions on for decoration...