What's The Difference Between Pretty Green, Sunny Side Up & Nightcap?

Choosing the right mattress can feel overwhelming, especially when you're not sure what firmness level will work best for your sleep style. What if you could adjust your mattress after you've brought it home? What if your sleep needs change over time, you want something new after 5-10 years, or you and your partner prefer different firmness levels? 

There are lots of reasons for needing a different mattress after a while, and our zipper mattresses mean you can do just that without the expense of replacing the whole thing.

At Rested Pillow, we've solved this problem with our innovative zipper mattresses. Unlike traditional sewn-shut mattresses, these customizable options let you access and swap the comfort layers to find your perfect sleep setup. No guesswork, no buyer's remorse, just the confidence that comes with true adaptability.

But with three different zipper mattresses to choose from: Pretty Green, Sunny Side Up, and Nightcap, you might be wondering which one is right for you. This guide will walk you through the key differences, helping you make an informed decision about which customizable mattress will give you the best sleep of your life.

What is a Zipper Mattress?

A zipper mattress is exactly what it sounds like: a mattress with a zippered top panel that gives you access to the comfort layers inside. The top quilted cover attaches to the main body of the mattress with a sturdy zipper that opens to reveal the mattress's comfort layers underneath.

Under the zippered panel, you'll find a variety of comfort layer options that you can swap out to customize your sleep experience.

Think of it like having multiple mattresses in one. Instead of being stuck with whatever firmness you initially chose, you have the flexibility to adjust and fine-tune your comfort level whenever you need to.

Why Choose a Zipper Mattress?

The mattress industry has trained us to accept a "hope for the best" approach when buying a new mattress. You test it in a showroom for a little while, make your best guess, and cross your fingers that it'll work for the next 8-10 years. We think that's unnecessary.

All mattresses, even zipper ones, will soften over time - there’s no getting away from it. Think about it like your favorite pair of super comfy shoes that you wear pretty much every day. All that use makes them tired and they’re eventually going to become a bit worn and not quite as supportive as they used to be.

The difference with a zipper mattress is that, when it starts to soften a bit more than you’d like, you only need to unzip it and replace the top comfort layer, not the whole mattress.

Here's why a zipper mattress changes everything:

Peace of Mind After Purchase: 

With our 100-night comfort guarantee, you get three months to make one free swap to help  you find your perfect comfort level. No pressure, no time limits within that window, just the assurance that we'll work with you to get it right.

This Could Be Your Last Mattress:

 Instead of buying an entirely new mattress every 8-10 years, you can refresh your comfort layers after 5, 10, or even 15+ years. Think of it like replacing the insoles in a quality pair of shoes rather than buying entirely new shoes. The support system stays strong, but you get that fresh, customized comfort.

Your Needs May Change: 

Maybe you're a side sleeper now, but you develop back issues and need to transition to sleeping on your back. Maybe your partner's preferences change, or you want to try a firmer feel for other reasons. With a zipper mattress, adapting is simple and affordable.

Split Firmness Without Compromise:

In a king size, one partner can get a firmer comfort layer while the other gets something softer,  all in one seamless mattress. No need to compromise or buy two separate twin XLs that create a gap down the middle.

Meet Our Three Customizable Options

All three of our zipper mattresses share the same core philosophy: giving you control over your comfort, both in those first 100 nights and years down the road. But each one serves different needs and preferences. Here's how they stack up:

Nightcap: Your Entry into Customizable Comfort

Nightcap was the first mattress we designed with a zippered top, and it remains an excellent entry point into the world of customizable comfort.

What Makes Nightcap Special: 

Built as a hybrid mattress with a slightly firmer feel compared to our other zipper options, Nightcap delivers solid support with the flexibility to adjust your comfort layers. The quilted modal cover provides a soft, breathable surface that complements the firmer support underneath.

Who Nightcap is Perfect For:

• Sleepers who prefer more support
• Back and stomach sleepers who need proper spinal alignment
• Anyone wanting customizable comfort at an approachable price point
• Those who like the security of a firmer foundation with adjustable softness on top

Comfort Layer Options: 

Nightcap offers four different comfort layer options, ranging from medium to extra firm. You can choose between our commercial-grade foam options or our plush Serene® foam for different feels while maintaining that supportive foundation.

The Bottom Line: 

Nightcap gives you a great introduction to zipper mattress technology without the premium price tag. It's perfect if you know you like firmer support but want the flexibility to fine-tune your comfort level.

Sunny Side Up: Our Most Versatile Best-Seller

There's a reason Sunny Side Up is our number one seller;  it truly fits almost every sleeper perfectly. This mattress combines premium materials with incredible versatility, making it ideal for couples with different preferences or anyone who wants maximum adaptability. The Sunny Side Up really covers the greatest spectrum of feel and firmness - from extra firm to ultra plush.

What Makes Sunny Side Up Special:

Under the 100% organic cotton zippered cover, you can choose from six different comfort layer options. That's more variety than any other mattress in our lineup.

The real difference comes from our most premium support unit, which features small coils around the entire perimeter for enhanced edge support, plus an additional inch of gel foam that transforms the entire feel of the bed. This premium foundation is what allows us to offer six distinct comfort options and call Sunny Side Up our most versatile mattress.

The organic cotton cover made from natural materials like New Zealand Joma® Wool and natural latex helps keep you naturally cool and comfortable as you sleep.

Plus, it's built on our most premium support unit, giving you the perfect foundation for any comfort layer you choose.

Who Sunny Side Up is Perfect For:

• Back, side, or stomach sleepers wanting balanced comfort
• Anyone who wants maximum versatility in their customizable mattress
• Couples with different sleep preferences
• Those who appreciate premium materials and organic cotton

Comfort Layer Options: 

Six options mean you can go from very plush to firm, with stops at every comfort level in between. Choose from commercial-grade foam for durability, Serene(r) foam for pressure relief, or natural latex for responsive, breathable comfort.

The Bottom Line: 

If you want the ultimate in customizable comfort with premium materials, Sunny Side Up delivers. The organic cotton cover, premium support unit, and six comfort options make this mattress adaptable to virtually any sleep style or preference change over time.

Pretty Green: The Ultimate in Natural Luxury

Pretty Green represents the pinnacle of what we do: handcrafted luxury that meets modern innovation. This is our most natural, sustainable, and luxurious mattress, combining traditional hand-tufting techniques with the convenience of zippered customization.

What Makes Pretty Green Special: 

Every Pretty Green mattress is hand-tufted for durability and that classic luxury feel you just can't get from machine manufacturing. We use only the finest materials, including organic latex, New Zealand wool, our most premium support unit and organic cotton, with no glues anywhere in the construction.

Who Pretty Green is Perfect For:

• Those wanting the most luxurious, handcrafted feel possible
• Eco-conscious sleepers prioritizing organic and natural materials
• Back, stomach, or side sleepers who prefer a firmer, responsive feel
• Anyone who appreciates traditional craftsmanship with modern convenience

Comfort Layer Options: 

Pretty Green focuses on quality over quantity with two premium latex options: medium latex for balanced comfort or firm latex for more support. Both options provide the responsive, breathable feel that natural latex is known for.

The Bottom Line: 

Pretty Green is for those who want the absolute best. The inner hand-tufted construction, all-natural materials, and sustainable design make this our most premium offering while still giving you the flexibility of zippered customization.

Side-by-Side Comparison

How the Free Comfort Layer Swap Works

One of the biggest advantages of choosing a Rested Pillow zipper mattress is our commitment to getting your comfort level exactly right. Here's how our free swap process works:

During Your 100-Night Trial:

If your comfort layer isn't quite right, simply contact us. We'll send you a different comfort layer option at no charge and provide instructions for the simple swap. You just unzip the cover, remove the current layer, and insert the new one. It takes about 10 minutes.

Beyond the Trial Period: 

Even years down the road, you can refresh your mattress by ordering new comfort layers. This is a fraction of the cost of buying an entirely new mattress and keeps your bed feeling fresh and supportive for decades.

The Value of Investing in a Zipper Mattress

Yes, a zipper mattress requires a slightly higher upfront investment compared to a traditional mattress. But when you consider the long-term value, it's actually one of the smartest purchases you can make.

Adaptability You Can't Get Elsewhere: 

Traditional mattresses lock you into one firmness level for their entire lifespan. With a zipper mattress, you have flexibility that simply doesn't exist in sewn-shut designs.

Long-Term Savings:

Instead of replacing your  mattress every 8-10 years, you can refresh the comfort layers for a fraction of the cost. Over 15-20 years, this can save you thousands of dollars.

Peace of Mind: 

There's no guessing with a zipper mattress. If your needs change or your initial choice isn't perfect, you have options. That confidence is worth the investment alone.

Quality Construction: 

All of our zipper mattresses use premium support systems and high-quality materials. You're not just paying for the zippered feature, you're investing in a mattress that's built to last decades.

Perfect for Long-Distance Customers

At Rested Pillow, we have customers from every corner of the US. Sometimes they’ve fallen for fancy marketing online and ended up with a mattress that isn't right for them - that they then have to try and return in sometimes an endless cycle.

If  you can't make it to our St. Joseph, MI showroom, it’s no problem.  Whether you take our personalized  Sleep Match Quiz, set up a time to talk to one of the owners or experienced mattress consultants, or even if you prefer to contact us directly via email, text, or phone, we will help you find the right mattress no matter which part of the country you live in.

Since we know it takes time to adjust to a new mattress, sleep on it for 3 weeks, and if it’s not working, we’ll work with you to find something that does.

Confidence Across the Country: 

Even if you're shopping from across the country, we're confident we can help you find what works best. Our zipper system means we can work with you remotely to dial in your perfect comfort level.

Too Firm? Too Soft? No Problem: 

When you sleep on your mattress for the first time, it might feel a bit too firm or soft, so although it’s important to take time finding the right mattress for you, you shouldn’t panic too much at this stage if it doesn’t feel quite “just right.”

All new mattresses, no matter how firm or soft, take a little bit of time to get used to, especially if you’re used to sleeping on something that was sagging or had lost support - think about it like breaking in those new shoes or a pair of jeans. We always recommend that you sleep on your mattress for at least 21 nights (3 weeks) to give it a chance.

Of course, if you’re really struggling to sleep on it or you feel sore and uncomfortable, it might be a case of the wrong fit. We'll then work with you to find a solution and send you a softer comfort layer for free during your 100-night trial period.

Personalized Support: 

Our team has helped customers from all over the US find their perfect sleep setup through our zipper mattress system. Distance doesn't limit our ability to get your comfort level exactly right.

Sustainability: A Mattress That Evolves With You

The mattress industry has a sustainability problem. Millions of mattresses end up in landfills every year because there's no way to refresh or modify them. Our zipper mattresses offer a better solution.

Keep It Out of the Landfill: 

Our innovative zippered construction gives you the flexibility to reinvent your mattress again and again, extending its usable life by decades.

Refresh, Don't Replace: 

Instead of throwing away an entire mattress when the comfort layer wears out, you simply swap in a fresh layer. The durable support system could last 20+ years with proper care.

Quality Materials: 

We use sustainable, natural materials whenever possible,  especially in Pretty Green with its organic cotton, natural latex, and New Zealand wool construction.

Made to Last: 

All of our zipper mattresses are built with longevity in mind. We're not interested in planned obsolescence; we want to make mattresses that serve you well for decades.

Which One is Right for You?

After learning about all three options, here's how to choose:

Choose Nightcap if:

• You prefer firmer support
• You're primarily a back or stomach sleeper
• You want to try zipper mattress technology at an approachable price
• You like the idea of customization but don't need maximum variety

Choose Sunny Side Up if:

• You want maximum versatility and options
• You're shopping for a couple with different preferences
• You appreciate organic materials and premium construction
• You want our most adaptable mattress for changing needs over time

Choose Pretty Green if:

• You prioritize natural, organic materials
• You want the most luxurious, handcrafted option
• You're eco-conscious and value sustainability
• You want the finest materials and traditional craftsmanship

Still Not Sure? The beauty of zipper mattresses is that there's less risk in choosing. With our 100-night trial and free comfort layer swap, we can work with you to find your perfect setup regardless of which model you start with.

We like to keep things simple for you. On our website, you’ll see our most popular foam types and firmness levels - the same ones that have worked for the majority of our customers over the years. Chances are, you’ll find your sweet spot right there.

But here’s the thing: everyone’s comfort is a little different. If you get your mattress and feel like you’d love it even more, a touch softer, a bit firmer, or with a totally different feel, we can make that happen. That’s when we’ll swap in one of the other foam varieties we talk about here.

Ready to Experience Customizable Comfort?

Here at Rested Pillow, we believe good quality sleep should be attainable for everyone, and that belief is at the heart of everything we do. Our zipper mattresses represent years of innovation and our commitment to solving the real problems people face when buying a mattress.

We're confident that one of these three options will give you the best sleep of your life. And if we need to fine-tune your comfort level, we're here to help every step of the way.

Visit our showroom in St. Joseph, Michigan to experience these mattresses in person, or contact us to discuss which option might be best for your specific needs. We'll walk you through everything just like we would if you were standing right here in our showroom.