Best Softest Mattress Topper For Side Sleepers

If you sleep on your side, a softer mattress topper can add cushioning where your shoulders and hips press into the bed. The picks below focus on plush pillow-top comfort, with options that differ in fill style, mattress fit, and available size or color. Before choosing, consider how much extra softness you want and whether your fitted sheets can accommodate a thicker sleep surface.

Quick Comparison

Our Picks: Best Softest Mattress Topper For Side Sleepers reviews

1. Niagara Sleep Solution Full: A Plush Pick for Full Beds

This full-size Niagara topper is designed to make a mattress feel softer without replacing it. Its top fabric is a blend of polyester and rayon derived from bamboo, and the product is described as a plush pillow-top layer. For side sleepers, that extra cushioning may make a firm-feeling surface more comfortable around the shoulders and hips, though it cannot change the support or condition of the mattress underneath.

The fitted skirt is made to fit mattresses 8–20 inches deep, with stretchy sides intended to help it stay in place. It is machine washable, which is useful for routine care. The topper arrives compressed; the product directions recommend shaking and patting it, then allowing up to 48 hours to recover, or using a short low-heat tumble-dry cycle to help restore its loft.

Some users describe a soft, comfortable feel and a fit that works well on their beds. This is a practical choice if you have a full mattress and want a cushioned, washable layer. It is not waterproof, and the product information does not give a specific thickness or describe a separate foam layer, so it may not satisfy shoppers looking for deep contouring or a precisely defined level of cushioning.

Pros:

• Plush pillow-top feel for adding surface softness
• Fits mattresses listed as 8–20 inches deep
• Machine washable for easier care
• Full-body dimensions suit a full mattress

Cons:

• Not waterproof
• Needs time to recover after unpacking

Verdict: Choose this version if you have a full bed and want a soft, washable topper with a deep-pocket fit.

2. Niagara Sleep Solution Queen: Soft Cushioning for a Queen Bed

This queen-size Niagara option shares the soft pillow-top design and fabric details of the full version, but it is sized for a queen mattress. The top fabric combines polyester with rayon derived from bamboo, while the bottom and skirt are polyester. Its plush surface is intended to add a cushier feel, which may suit side sleepers who find their current mattress too firm.

The stretchy skirt is designed for mattresses 8–20 inches deep. That range makes it worth checking your mattress height before ordering, especially if you use a thick mattress protector or have a pillow-top bed. The topper is machine washable and arrives compressed, so plan to give it time to regain its shape before making a judgment about its loft.

Some users find the surface soft and appreciate the secure fit. Compared with the WestMonth option below, this Niagara topper does not list a fill weight or a specific zone-quilting design. That makes the choice more straightforward if you want a soft fabric-topped layer, but less clear if you are shopping for a particular amount of loft or structured pressure distribution.

Pros:

• Queen sizing for a standard queen mattress
• Soft, plush surface intended to add cushioning
• Deep-pocket skirt fits mattresses 8–20 inches deep
• Machine washable

Cons:

• Not waterproof
• Does not specify a fill weight or topper thickness

Verdict: This is a sensible queen-size pick if you want a simple, washable pillow-top layer rather than a specified extra-thick fill.

3. WestMonth 1000 GSM: A Loftier Quilted Alternative

WestMonth takes a more explicitly lofty approach than the Niagara toppers. It is described as a 1000 GSM quilted topper filled with down-alternative fibers, with box quilting intended to keep the filling distributed. Its extra-thick design may appeal to side sleepers who want a more substantial cushion over a firm or aging mattress.

The product is described as breathable and designed to help manage airflow and moisture. Those are product claims rather than a guarantee that every sleeper will stay cool, since warmth can depend on bedding, room conditions, and personal preference. Its stretchable skirt is listed for mattresses 8–21 inches deep, giving it a slightly wider stated fit range than the Niagara options.

Some users describe the topper as soft and say it fits their mattress well; others appreciate the added cushioning under the shoulders and hips. The tradeoff is that a loftier pad can change the feel and height of the bed more noticeably than a thinner layer. It also arrives compressed and needs time to fluff up. If you want a specified thick, quilted style, this has a clearer design brief than the Niagara models; if you prefer a less bulky topper, the Niagara may be the better match.

Pros:

• 1000 GSM down-alternative fill is described as extra thick
• Quilted design is intended to help keep fill evenly distributed
• Fits mattresses listed as 8–21 inches deep
• Machine washable

Cons:

• Extra loft may feel too bulky for shoppers seeking a subtle change
• Needs time to expand after compressed shipping

Verdict: Consider WestMonth if your priority is a noticeably lofty quilted layer and your mattress can accommodate its added height.

4. Niagara Sleep Solution Queen in Dark Gray: Plush Comfort with a Color Choice

This queen-size Niagara topper has the same core design as the other Niagara choices: a plush surface with a top fabric made from polyester and rayon derived from bamboo, plus a stretchy skirt for fitting over the mattress. The dark gray version may be worth considering if you prefer that color, though the topper will normally sit under a fitted sheet.

Its stated fit range is 8–20 inches deep, and the product is machine washable. The soft surface can add a gentler feel for side sleeping, but it is best viewed as a comfort layer rather than a fix for a mattress that no longer offers adequate support. It is also not water resistant, so it does not replace a waterproof protector.

Compared with the standard queen option, the most useful difference in the supplied product details is the color and listing. The available information does not identify a meaningful change in construction or softness. That makes it important to choose based on your preferred listing and color rather than expecting a different level of cushioning.

Pros:

• Queen size with a dark gray color option
• Plush pillow-top style adds surface cushioning
• Stretchy skirt fits mattresses 8–20 inches deep
• Machine washable

Cons:

• Not waterproof
• Product details do not show a different construction from other Niagara queen versions

Verdict: Pick this version if you want the Niagara queen topper and prefer its dark gray listing; do not expect a different feel from the other Niagara queen options.

5. Niagara Sleep Solution Queen in Gray: A Washable Everyday Layer

This gray queen-size Niagara topper is another version of the brand’s soft pillow-top design. Its listed materials include a polyester and rayon-derived-from-bamboo top fabric, with polyester on the bottom and skirt. That combination gives you a fabric-topped cushion rather than a topper described as memory foam or latex.

The stretchy skirt is designed for mattresses 8–20 inches deep, and the topper can be machine washed. As with the other Niagara options, it ships compressed and may need time to regain its shape. Its soft feel may be appealing if you want a gentler sleep surface, but there is no listed thickness or fill weight to help you predict exactly how much cushioning it will add.

Some users describe it as comfortable and a good fit. The most practical distinction from the other queen Niagara listings is the gray color and product listing; the supplied details do not point to a major design difference. If you want a more specified extra-thick loft, compare it with the WestMonth. If you want a straightforward washable pillow-top layer, this Niagara is a simpler alternative.

Pros:

• Soft pillow-top design for added surface comfort
• Machine washable
• Fits mattresses listed as 8–20 inches deep
• Gray color option

Cons:

• Not waterproof
• Does not list a specific thickness or fill weight

Verdict: This is a good match if you want a washable, soft queen topper in gray and do not need a stated loft measurement.

How to Choose a Soft Mattress Topper for Side Sleeping

Choose softness that matches your mattress

A topper can change the feel of the surface, but it does not replace the support underneath. If your mattress is firm but still in good condition, a plush layer may add welcome cushioning. If it sags or feels uneven, adding softness may not solve the underlying problem. Think about whether you want a gentle change or a noticeably loftier bed before choosing between the Niagara pillow-top styles and the thicker WestMonth design.

Consider cushioning around your shoulders and hips

Side sleepers often want enough softness to make pressure points feel more comfortable while keeping the body supported. The Niagara toppers are described as soft and plush but do not list a thickness or fill weight. WestMonth specifies a 1000 GSM down-alternative fill and a quilted construction, which gives you more detail about its loft-focused design. These descriptions can help narrow your options, but your comfort will still depend on your body and mattress.

Check mattress size and depth

Choose a topper made for your mattress size, then measure the mattress depth before ordering. The Niagara versions in this guide are listed for mattresses 8–20 inches deep, while WestMonth is listed for 8–21 inches. A deep-pocket skirt may help the topper stay put, but bedding layers and mattress shape can affect the final fit.

Think about heat and fabric

The Niagara options use a top fabric that includes rayon derived from bamboo and are described as breathable and sweat-absorbent. WestMonth describes its quilted fiber fill and fabric as breathable and intended to support airflow. These details may matter if you tend to sleep warm, but they are not a promise that a topper will feel cool for every person. Your sheets, mattress, room, and preferred blankets also affect temperature.

Weigh loft against ease of use

A thicker topper can create a more noticeable change, but it may raise the bed and make fitted sheets feel tighter. A less specified pillow-top layer may be a better fit if you want a simpler addition. Check the product’s dimensions and fit range, and make sure your sheets can accommodate the topper along with your mattress.

Review care and setup needs

All five options are described as machine washable, but always follow the care instructions for the specific item. The Niagara toppers and WestMonth ship compressed and need time to recover their loft. Allow the recommended expansion time before deciding whether the topper feels right, and avoid assuming that a topper is waterproof unless its product details say so.

Frequently Asked Questions

Is a soft mattress topper a good choice for side sleepers?

It can be, especially if your mattress feels too firm around your shoulders or hips. A topper adds surface cushioning, but it cannot correct a mattress that is sagging or lacks support.

Which of these toppers is the thickest?

WestMonth is described as a 1000 GSM extra-thick topper with down-alternative fiber fill. The Niagara product details describe a plush pillow-top style but do not provide a specific thickness or fill weight.

Will these toppers fit a deep mattress?

The Niagara options are listed for mattresses 8–20 inches deep. WestMonth is listed for mattresses 8–21 inches deep. Measure your mattress before ordering and account for any additional layers on top.

Are these mattress toppers machine washable?

All five product descriptions state that the toppers are machine washable. Check the instructions for your specific model for water temperature, cycle, and drying guidance.

Do any of these toppers protect a mattress from spills?

The Niagara product details state that the toppers are not water resistant. The supplied WestMonth information does not establish that it is waterproof, so use a separate waterproof protector if spill protection is important.

How long should I wait before using a compressed topper?

The Niagara directions recommend shaking and patting the topper, then leaving it for up to 48 hours or using a low-heat tumble-dry cycle to help restore its shape. WestMonth also recommends allowing 24–48 hours for full expansion or using low heat as directed.

Which topper should I choose for a queen bed?

For a softer pillow-top layer, compare the three Niagara queen listings and choose the color and product listing that best suits you. If you specifically want a described extra-thick quilted design, consider WestMonth after checking its size and mattress-depth fit.

Final Recommendation

For most side sleepers looking for a soft, washable surface layer, the Niagara Sleep Solution Queen is the straightforward choice for a queen bed, while the full version fits a full mattress. If you want more explicitly lofty cushioning and a quilted down-alternative design, consider WestMonth instead. Measure your mattress, check your sheet fit, and choose the level of added loft that suits your bed.