You probably are asking what is the best thing to use in their cages to keep odors down and the guinea pigs comfortable. This link lets you know the pros and cons of various types of bedding:
Take a look under this section of the link for a quick comparison:
We have 7 guinea pigs and my husband made these sacks and he has 2 for each piggy. He has an extra one so he can switch them out easily when cleaning the cage. He washes them in our washing machine. https://www.youtube.com/watch?v=Zh3xUJIF0L4
Here's a link on the best beds:
Here's a post that might help - https://danniducklovespiggies.tumblr.com/post/123472980372/diy-no-sew-guinea-pig-bed
The Five Best Beds for Guinea Pigs
Making the Best Guinea Pig Beds
Straw or shredded paper will be fine or sawdust or wood chips!
Hi Heidi, we tried all kinds of beds for our Guinea Pig Alley, but she loves her shredded news paper the best. You can also take an old sweater and cut it up for yours to snuggle under if it's chilly. Just hem the edges so they don't fray when they go into the wash.
How about a DIY project?