We do not recommend leashes and collars for gliders as they cause great damage to their bodies.
First if your glider were to jump with a collar on it very well could choke.
Plus the Harnesses are made are to go around their bodies, restricking the spreading of the gliding membrane.
When they jump the harness rips their gliding membranes.
And either way can result in death or serious injury.
Sugar Gliders are jumpers and it is part of their nature.
Please do not purchase any type of leash as you will suffer some sort of heart break and your glider serious or fatal injury.
Please use the proper Bonding steps as recommended along with love and patience as shown on all sugar glider web sites, that offer the proper steps and your glider will never leave your side.