Oh I hate those mesh haynets. They drive me crazy trying to fill them up and I'm worried my horse will get their leg and neck caught up in them and injure themselves. I have an accident-prone yearling, I try to decrease my chances of him getting hurt LOL.
I use these bags and I LOVE them. Slow Feed Nylon Hay Bags by Derby Originals
I can fit up to 3 flakes in them and it really slows down their eating(probably even more so than the nets.) They're usually $27.50, but Horseloverz.com had them in their online auction and I got three of them for $20 each. So I basically got one free at the usual price! They're a different brand so we'll see how well they hold up. The Derby brand usually lasts me 3-4 months a piece of daily use, being beat up by a yearling and a pony, and exposed to the elements 24/7.