







🛡️ Sleep Clean, Sleep Cool, Sleep Confidently!
The National Allergy 100% Cotton California King Mattress Encasement offers a premium, hypoallergenic sleep surface with a tightly woven 300 thread count cotton fabric that blocks dust mites and allergens. Its 6-sided zippered design with an auto-lock zipper ensures full mattress protection, while the breathable, noiseless cotton keeps you cool and undisturbed all night. AAFA certified and machine washable, this encasement fits mattresses up to 12 inches deep, combining health-conscious innovation with effortless maintenance.










| ASIN | B002R0DR7Y |
| Age Range Description | Adult |
| Best Sellers Rank | #110,563 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #162 in Mattress Protectors |
| Brand Name | National Allergy |
| Closure Type | Zipper |
| Color | 12-inch (Depth) |
| Customer Reviews | 4.2 4.2 out of 5 stars (1,431) |
| Fabric Type | Cotton |
| Global Trade Identification Number | 00803650004738 |
| Item Display Dimensions | 72 inches |
| Manufacturer | National Allergy |
| Manufacturer Part Number | 10017 |
| Material Type | Cotton |
| Model Name | 10017 |
| Model Number | 10017 |
| Number of Items | 1 |
| Other Special Features of the Product | Breathable, Fully Encased, Hypoallergenic, Noiseless, Washable |
| Product Care Instructions | Machine Wash |
| Size | Cali King - 12-inch (Depth) |
| Thread Count | 300 |
| UPC | 803650004738 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Not Water Resistant |
B**N
Soft, effective allergy control mattress cover
Got this a few weeks ago after first trying the Allersoft pillow cover made from the same material. I have a dust mite allergy and was constantly suffering with a very stuffy nose all night long. OTC medication (Zyrtec) did not help it. The only thing that helped was prescription Flonase. But after using it 2+ years, my nasal cavities became irritated. So I tried this mattress cover, and switched to Allegra OTC. My allergy symptoms are much better. Not 100% gone, but 80-90%. I only have occasional stuffy nose while sleeping now, and suspect it is due to dust mites in the room (carpet) and not from the mattress. My next step will be to eliminate the carpet and go to hardwood floors. Oh, I also use an Eco Living Friendly (ELF) box spring protector purchased from Amazon. I can't say for sure that either the mattress covers or the Allegra have provided the biggest benefit. But the cost for the mattress cover is only equal to a few months of allergy medication, so it is money well spent if it adds another layer of control. I can say that there have been no negative effects from the mattress cover. The best thing about it is it is very soft and cool. It was easy to put on a regular twin. All I did was raise up the mattress from the foot of the bed until it was vertical. Then slid the cover over the top (head) and pulled it down to the bottom. Then laid the mattress head back down, lifted the mattress foot slightly, and pulled the cover over the foot of the mattress and zipped it up. It fits quite loose on my regular 7" deep mattress, so I just tucked the extra material underneath. For anything larger than a regular twin, this is probably a 2 person job to put on.
M**O
Nice and easy
These were easy to install onto my mattress although when zipping it up I had to be extra careful as it reluctantly zipped but I won’t be taking it off again for what I hope will be at least a couple years so that was not much of a problem. There’s not much noise to be heard when you lay on it, I just hear my sheets whispering which isn’t near as loud as my previous mattress cover was so I’m very pleased with this one. It had a bit of that new smell but it’s already gone a few days later too.
M**L
Breathable and quiet
Exactly what I wanted! No heavy plastic backing so it's super breathable and quiet. I keep forgetting it's even on the mattress. I ordered a size up for the depth of bed I have. I just tucked the extra material under the mattress.
K**.
Used, wrong size, & the right size won’t fit anyway, because it doesn’t have proper corners sewn in.
My mattress is Queen so I ordered a Queen. What I received has a label which says Queen/Full but is actually King sized. It doesn’t have fitted corners - it’s just a big bag. The zipper was broken and the whole thing came in a bag which say Amazon return on it. There was a hole in the bag immediately around it, and the second bag wasn’t sealed so as soon as I got the Amazon envelope open, the entire thing fell out onto the ground, and I could see that it had simply been watered up, not folded. It had dirt on it as well. So this is bad manufacturing and bad handling by Amazon. Returning it to get another brand because I want something that actually fits a mattress.
A**N
Comfortable mattress, good quality at good prices
Good quality at an acceptable price. Item is well packed and at good condition. Comfortable mattress and the size fits as what the description says. It takes time to see if it really works to prevent allergy.
M**U
every bed must have.js
why are these like not included with every mattress? if this had 2 conditions it would be absolutely perfect one if it was waterproof and if it was organic which there is version that is organic from National Allergy but idid not get it not cause it was more expensive but it had pores of ibelieve around 4 microns n this one has protections of 2.6 microns. also the 2 i purchased were both true to size if not a lil extra. both made in the USA. also before purchasing these iread some say that it was flimsy n it ripped with a light tug n was bad quality n that did cause me worries n almost looked else where but after looking around nothing fit my needs. it had to Made in USA it had to be bug and dust mite proof and it had to also mean the zip was bug and dustmite proof it had to be all cotton... with that in mind i took a shot n am not disappointed super choice. machine washed dryer dried both king and cali king once and no shrinkage no pilling very happy. with all things considered why doesn't every bed have this. highly recommended. hopefully national allergy association will come with a organic cotton version with 2.6microns or less version n if it was organic n waterproof then watch out but until then closest to prefect ifound . oh and allmost forgot this comes with a lifetime warranty. SO Totally worth it.js
R**O
Life Saver
This allergy-proof, dust-proof mattress cover has been a total lifesaver for me! I'm severely allergic to dust mites, get styes and bad eye allergies, and I also have cats, so keeping my bed allergen-free has always been a challenge. Since using this cover, my nights have been so much more comfortable, and my allergies are finally under control. The cover fits my mattress perfectly, creating a snug, impenetrable barrier. The material feels durable yet soft and breathable—| was worried it might feel plasticky or noisy, but it doesn't at all. It's also super easy to clean, which is a must with cats around. What I love most is that it doesn't just keep out dust mites; it also keeps cat hair and dander from settling into my mattress. Now I can cuddle with my cats without worrying about allergens building up where I sleep. If you're someone with allergies and pets, this is an ansolute must-have. My quality of sleep and overall comfort have improved so much, and I couldn't be happier with this purchase!
K**R
Comfortable and highly effective
Highly recommend these for dust mite allergy! My partner would wake up every morning with a sinus headache so we decided to try this. We first tried a few cheaper plastic based alternatives but they made the bed so hot. This one though slips on and you don't even realize it's there. Her headaches have completely disappeared. Definitely buy the matching pillow cases as well.
T**N
I couldn't sleep at night because was spending so much time itching. I couldn't understand why but someone told me it might have something to do with dust mites? So I bought this cover as per the articles I've read online and I haven't scratched in my sleep since.
A**N
Satisfaite
E**S
Use it to protect our mattress in our camper. Works better than expected and fits well. Great quality. Will not disappoint.
M**A
This was the only product I could find on Amazon that advertised an adequately small pore size required to manage a dust allergy. This product is 2.6 microns. The fact that it’s made of cotton is a bonus as well so it’s not so uncomfortable.
M**A
Queen size was the perfect fit for my queen mattress. Relatively easy to put on, and feels like it's of good quality. My only wish is for the price that it would be water/spill proof on one side as optional.
Trustpilot
Hace 1 semana
Hace 1 semana