Utopia Bedding Throw Pillows Insert (Pack of 2, Navy) - 26 x 26 Inches Bed and Couch Pillows - Indoor Decorative Pillow

Can you 'Karate Chop' the pillows for a nice crease? Thanks!

Do these pillows contain fire retardants or other chemicals? Are they Hypoallergenic?

Are these pillow inserts puffy or do they go flat after few uses? Have a bad back and I need to use them to prep my back straight while sitting.

Are they hypoallergenic?