# Primesoft King Size Waterproof Mattress Topper 21in

Check the price and price history for Primesoft 100% Waterproof King Size Mattress Topper, then decide if it matches what you need.

- [Original product page](https://www.ofertitastop.com/us/product/primesoft-king-waterproof-mattress-topper-21in)
- [View offer](https://www.ofertitastop.com/us/visit/primesoft-king-waterproof-mattress-topper-21in)
- Market: US
- Language: en-US
- Currency: USD
- Product updated: 2026-10-16T22:19:22.992Z
- SKU: ofertitastop-us-47064
- Category: Home & Garden > Linens & Bedding > Bedding > Mattress Protectors > Mattress Pads
- Source store: amazon US
- Active deal: Yes
- Price: 49.49 USD
- Previous price: 54.99 USD
- Discount: 10%
- Rating: 4.3 / 5
- Reviews: 1735

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## Description

## The essentials

The Primesoft 100% waterproof king size mattress topper delivers a soft, breathable layer that helps protect your mattress while adding a plush pillow top. It blends 70% rayon fiber with 30% polyester to create a smooth, comfortable surface that wicks moisture and remains airy through the night. The filling is a 100% down alternative, offering a cozy feel without the concerns of traditional down. This topper is designed to keep you dry and cool, even when spills happen, so you wake up feeling refreshed and ready to tackle the day. With a fashionable wavy thread sewing design, it adds a touch of elegance to any bed while staying practical for everyday use. The topper fits most mattresses from 8 to 25 inches thick and accommodates up to 21 inch deep pockets, making it a versatile upgrade for a wide range of beds. Washing is simple thanks to machine washable fabric, with a low temperature dry cycle that helps maintain its loft and shape over time. Expect a breathable barrier that protects the mattress but remains soft to the touch, turning an ordinary night into a more comfortable experience. This is a thoughtful choice for back pain relief and improved sleep temperature, helping you fall asleep faster and stay asleep longer. 😴 The care routine is straightforward, and customer support is ready to assist with any questions or concerns you may have about fit or maintenance. 💬

## Technical details

The Prime features of this mattress topper center on comfort, protection, and ease of care. The fabric blend and down alternative filling provide a cloud-like surface that still breathes, ensuring you don’t overheat during the night. Waterproofing is integrated to prevent moisture from reaching the mattress, which is especially valuable for households with pets, children, or overnight guests. The unique wavy stitching not only preserves loft but also reduces shifting, so you wake up with a more even surface across the bed. The product is designed to be durable and easy to care for, supporting regular machine washing at 30°C and gentle drying to keep the topper looking and performing well wash after wash. This makes it a practical solution for busy households that want quality sleep without high maintenance. A practical benefit for back pain sufferers is the extra cushion layer that reduces pressure points and helps maintain spinal alignment during the night. If you value a clean, protected sleeping surface with a touch of luxury, this topper aligns with those goals. 

## Product specifications

- Name: PRIMESOFT 100% Waterproof King Size Mattress Topper
- Type: Mattress topper
- Size: King
- Dimensions: Fits 8-25 inch thick mattresses, up to 21 inch deep pockets
- Material: 70% rayon fiber, 30% polyester, filling 100% down alternative
- Color: White
- Water resistance: Waterproof top layer for added protection
- Care: Machine washable at 30°C, tumble dry low
- Pattern: Wavy thread stitching for style and durability
- Compatibility: Designed to fit most king size mattresses and protect against spills, stains, and general wear

## For whom it fits

This topper is ideal for sleepers who want additional cushioning and a dry sleeping surface, especially if you share a bed with pets or little ones. It’s a solid choice for those dealing with mild back discomfort who need extra support without sacrificing softness. The waterproof layer adds peace of mind for accidental spills or nighttime hydration, and the low-maintenance care routine helps you keep the bed fresh with minimal effort. Overall, this Primesoft topper blends comfort, protection, and practicality in a single package that elevates any king size bed.

## Images

![Primesoft King Size Waterproof Mattress Topper 21in — 1](https://www.ofertitastop.com/i/uqPtwdphlfc8_tCdfX08JGMNMEsEoTuG-pmA0Ue5wc2OQF2UAwwKCPOp3GtqacrfjA8COjDsMrERZnS0Z3jYfvugHSBuW23BYW0-Uu9JTilfgqs-NJWUYCNqvw.jpg)

![Primesoft King Size Waterproof Mattress Topper 21in — 2](https://www.ofertitastop.com/i/r3AO8JNeiP1q35UqGglDqTc1h0TQxfd-UOFpCRcey9tDV2_0hgYmf7uirlIDpQlKuESfqfd0DYKqH2KkIlUanEWSLZmaJA2SjfJfsaf_F-V2XIfBNy34ViPd2g.jpg)

![Primesoft King Size Waterproof Mattress Topper 21in — 3](https://www.ofertitastop.com/i/BI1vNEnDysmnZjoDReckYXLEtTUUxQaX6uxQXztFzO6Mr8ivxyio9xnOJNlnc2CBG5UHvUCKvAFOsYM_dtOBvk1_ZZ5e-NuVBrNspi_tfOiVxOS8gsfDJauzlQ.jpg)

![Primesoft King Size Waterproof Mattress Topper 21in — 4](https://www.ofertitastop.com/i/OIpjfq_L2H48twGiv0pUdBAg187ZG-TU0kVh0LjnjYI1exGprbyiwFIBkMj9qZ8wKYCMyVyQZNCWv1p0vS7i4Zda5LaWch3s7-cZ85njoZpDaWvnalSbDZ--_w.jpg)

![Primesoft King Size Waterproof Mattress Topper 21in — 5](https://www.ofertitastop.com/i/XF8U02_wCKYqSZ2z6EeYtK8qQlhh8cEMzAiD-FJg7AqF0dO_W-x9QjX-SDmIWbRoY5xYdYgRKJwP2OYzivhwx8w6trzo8J0f77TZ0sCSetqXf3IMzWoDpoCy5w.jpg)