After you've had your ostomy for a while, you get a good sense of when you'll be extra active at night, or you might wish to be safe every night. Nothing worse than a pouch bursting in the middle of the night. This is what I've learned to do:
You will need.
Hollister irrigation sleeve. Hollister base unit. Barrier. Hollister pouch for daily use to go with barrier base.
You take the sleeve, toss the irrigation stuff that can come with it and in the future only order sleeves.
Take the top two tabs and roll them down, sealing the top of the bag when you bend the tabs inward.
Go to the bottom of the sleeve. Bend the end over approximately 3/4 to 1 inch. Attach the clip that comes with the box.
Now comes an important step. Find a metal clip, such as used to close potato chip bags, and put it OVER the plastic clip that you have folded 4 or 5 times up the bag. The plastic clip by itself is NOT strong enough to withstand a full or semi-full bag.
Take your Hollister pouch off and put this on. The sleeve will hold a lot!
In the morning, bring your pouch and sleeve still attached to you to the toilet. Undo the tabs. Unroll the top of the sleeve. Remove the sleeve from your barrier. Raise up the clip end and dump the contents into the toilet. Put your pouch on asap so you don't squirt all over the floor like I have done when delaying too long. Take the sleeve to the tub sink or wherever to rinse out and hang dry for another night. Or dispose of it. The sleeve material is amazingly easy to clean and I reuse them 4-5 times.
I hope this helps someone out there. I'm wearing a sleeve right now and will sleep like a baby.