Best Twin Extra Long Size Mattress Encasements of 2025

The Twin XL Size Mattress Encasement is a six-sided zippered mattress protector that completely encases your mattress while providing waterproof and allergy relief. The hypoallergenic construction and impenetrable cover help you stay healthy and breathe easy while the stretchable, breathable fabric keeps liquids and allergens out without compromising comfort. The full zipper wraps all the way around the mattress and makes it easy to put on and take off. Made of high-quality polyester and polyurethane, this durable and long-lasting mattress encasement is machine washable for easy cleaning and lasting use.

The Moonsea Zippered Mattress Protector Twin Extra Long is a high-quality mattress encasement designed specifically for twin XL size mattresses. With dimensions of 39 inches by 80 inches and a deep pocket that can accommodate mattresses that are 11-14 inches deep, this mattress protector fits perfectly. The standout feature of this mattress protector is its durable zipper, which ensures that the zipper won't get stuck or dislodged when changing the encasement. The waterproof and breathable design of this encasement sets it apart from others on the market, as not only the top surface but also the 4 sides and the bottom are waterproof, preventing any liquid from leaking into your mattress. Additionally, the super soft terry surface of this mattress protector provides a comfortable feel while you sleep. With Moonsea, you can trust the quality and rely on their excellent customer service.

Bedsure Mattress Encasement is a waterproof mattress cover that protects your luxury mattress from spills, stains, and moisture. Made with impermeable TPU, it is perfect for sweaty sleepers, parents with young children, and those who eat or drink in bed. The 6-sided zippered design completely encloses your mattress and box spring, safeguarding your family against bed bugs and dirt. The secure end stop zipper with foam pad cover upgrades the security level of protection. This lightweight polyester microfiber encasement is easy to install by one person. Bedsure Mattress Encasement provides complete protection, extends the longevity of your mattress, and is easier to preserve, move, and wash than the mattress itself.

Biloban Mattress Protector is designed as an alternative to bed skirts, concealing your box spring for a tidy appearance. It perfectly fits low-profile box springs up to 5 inches thick. The mattress cover offers 100% waterproof protection with thick PU material on all 6 sides, safeguarding against liquid spills. Easy care instructions allow for machine washing in cold water and low tumble drying without bleach. With Biloban's Life Guarantee, you can trust the quality and get a replacement or money back if needed.

Protect your luxury mattress with the Kingnex Mattress Protector. This encasement is 100% waterproof and protects against spills, stains, and moisture. It fully encases and protects your mattress on all 6-sides with a fine teeth zipper to keep out all unwanted things. The smooth knitted polyester surface ensures a soft and quiet feeling to sleep on while providing complete protection. The back of all 6 sides are coated with a membrane layer that repels liquids such as sweat and urine while still allowing air to pass through, providing excellent breathability for less heat up. This Twin XL 39 X 80 inches mattress protector fits 9-12" deep mattresses and is easy to care for, being machine washable and tumble dry with low heat.

The HOSPITOLOGY Box Spring Encasement is a lab-tested cover made of stretchable 100% polyester knit fabric that fits box spring depths of 9"- 11". It can help improve sleep by reducing common substances that can reach the sleeper and disrupt respiratory function. The encasement is machine washable and dryable, and it comes with an installation kit. This product is hypoallergenic, bed bug, and dust mite proof, which can help protect your box spring and prevent allergic reactions. With a 5-Year Limited Manufacturer's Warranty, you can sleep soundly knowing your box spring is protected by this Sleep Defense System.

The Kingnex Waterproof Mattress Protector is designed to keep your Twin XL mattress safe from spills and stains. Its fully waterproof design shields against perspiration and bedwetting, ensuring your mattress stays clean and dry. With a fine-toothed zipper, this encasement provides complete coverage, giving you peace of mind. The soft knitted fabric feels gentle against your skin and maintains the original comfort of your mattress. Plus, it’s easy to care for, as it's machine washable and dryer-safe, making maintenance a breeze for busy college students.

The Ptsuker Mattress Protector is designed to keep your mattress safe and comfortable. Its waterproof feature protects against spills and stains, ensuring a clean sleeping surface. The soft polyester jersey fabric provides noiseless comfort, allowing you to enjoy peaceful nights without disturbances. With an invisible zipper and Velcro closure, this protector fully encases your mattress, preventing dust and pests from getting inside. Additionally, it fits deep mattresses ranging from 6 to 10 inches, providing a snug fit that won't shift during the night. Enjoy a worry-free sleep with this versatile and practical mattress protector.

The WINKAURA Waterproof Mattress Cover is designed to fit Twin XL mattresses with depths of up to 9 inches, ensuring a snug and secure fit. This mattress protector features a premium waterproof lining that effectively shields your mattress from spills, sweat, and stains, keeping it clean and dry. With its soft microfiber finish, you can enjoy a comfortable and quiet night's sleep without compromising the feel of your mattress. Plus, it's machine washable, making maintenance a breeze, so you can easily keep your bedding fresh and hygienic.