Ogallala Down Hypodown mattress enhancers provide big, billowy comfort and a great night's sleep. Top of the line hypoallergenic Hypodown mattress enhancers in 700 fill power white Hungarian goose down are sewn in baffled box design. They are also available in 800 fill power. You will be surprised how refreshing one night on a Hypodown bed can be. Hypodown products are custom made in Ogallala, Nebraska. Custom made bedding may not be returned. Ogallala Down also makes featherbeds which are 75% feathers and 25% down, encased in cotton twill and stitched in 3 horizontal channels (please note feather + down combination is not hypoallergenic). Return to Ogallala Down Homepage. Return to featherbeds or bedding basics. Twin 39"x75" Hypodown Mattress Enhancer 700 Fill Power OG-FBH700T$980.00 Queen 60"x80" Hypodown Mattress Enhancer 700 Fill Power OGA-FBH700Q$1,680.00 King 76"x80" Mattress Enhancer Hypodown 700 Fill Power OGA-FBH700K$2,040.00 Cal King 72"x84" Hypodown Mattress Enhancer 700 Fill Power OGA-FBH700CK$2,060.00 Aiko Luxury Linens - Miami, Florida