HEST Mattress Pad Sizes Compared: Which Fits Your Tent and Body

Quick answer

For solo tent campers, the Foamy in 25" x 78" fits most adults and standard one-person tents. If you sleep on your side or want extra room, the Foamy Wide 30" x 78" is the better match. For Rivian owners, the Foamy For R2 and Foamy For R1S are custom-shaped for those vehicles and are not tent mattresses.

HEST mattress pads come in a few distinct shapes, and the size you choose affects both how well you sleep and whether the pad actually fits your tent. The main decision is between the standard Foamy sizes and the vehicle-specific Foamy For R2 and Foamy For R1S. Each has a different footprint and a different job.

This comparison breaks down the supplied dimensions and design details so you can match a pad to your body, your tent floor, and how you travel. We will also cover the trade-offs of going wider or shorter, so you can pick the size that works for your setup without guessing.

Foamy sizes: 25" x 64", 25" x 78", and 30" x 78"

The Foamy is HEST's general-purpose camping mattress, available in three sizes. The Foamy Short measures 25" x 64", the standard Foamy measures 25" x 78", and the Foamy Wide measures 30" x 78". All three use two layers of enhanced memory foam for comfort and support that HEST describes as rivaling a home mattress in a packable form.

The 25" width is a common solo sleeping pad width, while the 30" width adds five inches of shoulder and hip room. The 64" length suits smaller sleepers or shorter trips where packed size matters most, and the 78" length matches what most adults need to stretch out fully. The trade-off is straightforward: more surface area usually means more comfort but also more bulk and a larger footprint in your tent.

• Measure your tent floor before choosing: a 30" wide pad takes up noticeably more room than a 25" pad.
• If you are between lengths, the 78" version is the safer choice for adults who sleep stretched out.

Foamy For R2 and Foamy For R1S: vehicle-specific fit

The Foamy For R2 and Foamy For R1S are designed specifically for the Rivian R2 and Rivian R1S, respectively. They are not sized like the standard Foamy pads. The Foamy For R2 turns the back of your EV into a custom-fit sleep system, and the Foamy For R1S mimics the curvature of the R1S so it stores in the frunk and deploys into a bed in the back.

Both are sold as single mattresses. The Foamy For R1S can link with a second mattress to create a double bed, and the Foamy For R2 is sold as a single mattress for the driver and/or passenger sides. If you sleep in your Rivian, these are the sizes to compare. If you sleep in a tent, stick with the standard Foamy line.

• Vehicle-specific pads are shaped for the car, not for a rectangular tent footprint.
• Check whether you need one or two mattresses to cover your full sleeping area.

How body size and sleeping position affect your choice

Your height and sleeping position matter more than tent size alone. A 64" pad works for children or shorter adults, but most adults who sleep on their back or stomach will want the 78" length to avoid dangling feet. Side sleepers often benefit from the extra width of the Foamy Wide, because shoulders and hips need more room to stay supported.

The Foamy contains two layers of enhanced memory foam, so the surface adapts to pressure points. That said, a wider pad only helps if your tent can hold it. A 30" x 78" pad in a narrow one-person tent leaves little room for gear. If you share a tent, two 25" pads side by side may fit better than one wide pad.

• Back and stomach sleepers: prioritize length first, then width.
• Side sleepers: prioritize width first, especially at the shoulders.

Tent mattress fit: matching pad dimensions to your floor

Tent floors are usually measured in rectangular dimensions, but usable space is often smaller because of sloped walls. A 25" x 78" Foamy fits most one-person and two-person backpacking tents. A 30" x 78" Foamy Wide is better suited to a two-person or three-person tent where you have room to spread out.

If you use a vehicle-specific pad, your fit is determined by the vehicle rather than the tent. The Foamy For R1S and Foamy For R2 are shaped to the Rivian cargo area, so they will not match a standard tent rectangle. Measure your tent floor at the widest and longest points, then compare those numbers to the pad dimensions before you buy.

• Account for tent wall slope: the floor's stated width may not be usable at sleeping height.
• Leave a few inches of margin so you can move without hitting the tent walls.

Trade-offs to weigh before you choose

• Foamy Short 25" x 64" vs. Foamy 25" x 78": The short version saves packed space and fits smaller tents, but taller sleepers may find their feet hanging off. The 78" version costs more space but suits most adults. Choose the 64" only if you are under roughly 5'4" or prioritize a minimal pack.
• Foamy 25" x 78" vs. Foamy Wide 30" x 78": The wide version adds 5" of width for side sleepers and couples who want room, but it takes up more tent floor and packs larger. Go wide only if your tent can spare the extra 5" across.
• Foamy vs. Foamy For R2 / R1S: The Foamy line is sized for tents and general camping. The Rivian-specific pads are shaped for the vehicle cargo area and are not interchangeable with tent footprints. Match the pad to where you sleep, not just to your body size.

Product facts at a glance

• Foamy: Available in Foamy Short 25" x 64", Foamy 25" x 78", and Foamy Wide 30" x 78". Contains two layers of enhanced memory foam. Gives you three clear size choices for tent camping, with the wide version adding shoulder room and the short version saving packed space.
• Foamy For R2: Designed specifically for the Rivian R2, with temperature-resilient memory foam and a durable waterproof base. Rolls compact for storage in the frunk. Sold as a single mattress for the driver and/or passenger sides. If you sleep in an R2, this pad fits the vehicle's contours instead of a rectangular tent floor, and the waterproof base protects against vehicle cargo area moisture.
• Foamy For R1S: Designed specifically for the Rivian R1S, mimicking the vehicle's curvature. Stores in the frunk and deploys into a bed in the back. Can link with a second mattress to create a double bed. Sold as a single mattress. R1S owners get a custom-fit pad that can be expanded to a double, but it is not a tent mattress and requires a second unit for full-width coverage.

Which HEST mattress pad size should you choose?

Best for

• Solo tent campers who want a standard 25" x 78" fit for most one-person tents
• Side sleepers or couples who want extra shoulder room with the Foamy Wide 30" x 78"
• Rivian R2 or R1S owners who want a custom-fit sleep system for their vehicle

Not for

• Tent campers considering the Foamy For R2 or Foamy For R1S, which are shaped for Rivian vehicles
• Sleepers taller than about 5'4" who need a full 78" length and are looking at the Foamy Short
• Buyers who need a pad to fit a narrow tent and are considering the 30" wide Foamy

The right HEST mattress pad size comes down to where you sleep and how much room you have. For tents, the Foamy in 25" x 78" is the safe middle ground, with the Wide and Short versions covering specific needs. For Rivian owners, the Foamy For R2 and Foamy For R1S are the only sizes designed for your vehicle. Measure your space, match the pad to it, and you will sleep better for it.