When you want to purchase zero gravity chairs, you will notice that there are a lot of manufacture that creates this kind of zero gravity recliner. Of course they would create it differently since they want to reach out to more market class so you will have affordable option or even the high priced one. Usually the price of each recliner chair is affected by the material used to create the frame or even mattress of the chair. High technology used on the chair will surely give great effect on the price range for each chair.
If you purchase zero gravity recliner that used leather material, then the price would be higher especially if they uses premium one. For more affordable option you can choose the leather with lower bonded level or even faux suede for cheaper price. There are also exotic wood material which would be much expensive than one with bamboo material. For upholstery made from leather it surely will be higher in price but more comfortable to use. Use fabric material for the upholstery if you want to get cheaper price.
Outdoor type zero gravity chair will be much affordable since they only use metal tube and fabric or canvas material for the mattress. Usually it could be folded and very light in weight so you can move and store it easily. To reach the zero gravity position, you will need to use manual lever to operate it, but make sure that they have lock function so you can stay in the position. There are also gaming chair with zero gravity function where you can pull back the chair into position while using it on the floor. Of course this would only be useful if you are still young and do not have any difficulties to squat into position.