Extra thick condoms are put on in the exact same way as normal condoms, so you won’t need to learn any new tips or techniques. Don’t use your teeth or sharp nails to open the packet, otherwise you might accidentally tear the condom. Grasp it by the teat to prevent air bubbles from entering, then roll it down your penis with your thumb and index finger. It’s very easy to do but may take a little practice due to the thicker material.