Coil Count and Innerspring Specifications for Every Avocado Mattress

Every Avocado innerspring mattress uses individually wrapped coils — each encased in food-grade, non-toxic polypropylene fabric — so they move independently rather than in a connected grid. This means the mattress responds to your body rather than the whole surface shifting when you or your partner moves.

Most Avocado mattresses use a single coil unit. Some models use two coil layers — a thinner comfort layer and a deeper support base — explained in the sections below.

Base Coil Unit (8 inches): The primary support system in every innerspring mattress. Taller coils with more travel, designed for spinal alignment, pressure distribution, and long-term durability. Present in every Avocado hybrid model.

Micro-Coil Comfort Layer (1 inch): A second, shallower layer of individually wrapped springs used in the Luxury Organic Pillow-Top and Box-Top. Positioned above the base unit, these smaller coils add a responsive, body-contouring feel and improve motion isolation between sleep partners. The Wool Mattress also uses a 1-inch micro-coil layer as its top comfort layer.

Most Avocado base coil units are arranged in seven ergonomic zones. Most mattress brands that advertise "zoned support" reinforce only the two long sides — left and right — resulting in five zones in total. Avocado reinforces all four sides: left, right, head, and foot. That's what makes it seven zones, and it means you get consistent edge support around the entire perimeter — not just where you're most likely to roll off, but also at the head and foot where the mattress structure is most likely to compress and degrade over time.

The three interior zones — head/shoulder, hip/torso, and leg — use different wire gauges to vary firmness by body region. The hip/torso zone uses slightly narrower-gauge coils (softer) for pressure relief, while the head/shoulder and leg zones use heavier-gauge coils (firmer) for alignment and support. Because the head and foot zones are identical, the mattress is designed to be rotated regularly — reversing the head and foot positions helps extend the life of the comfort zones evenly.

The Green, Medium, Plush, and Ultra Plush mattresses use three wire gauges: 16-gauge perimeter, 15-gauge center, and 14-gauge shoulder and hip zones.

The Firm mattress uses a single-gauge coil design — 14-gauge throughout — with varying wire diameter by zone: reinforced top/bottom perimeter (0.08"), sides (0.07"), head/shoulder zones (0.07"), and center hip zone (0.08").

Four reinforced perimeter zones — including head and foot — plus three interior zones with varying wire gauge by body region. Most mattress brands reinforce two sides. Avocado reinforces all four:

(8-inch base unit)

(8-inch base unit)

(8-inch base unit)

(1-inch micro-coil comfort layer + 8-inch base unit)

(1-inch micro-coil comfort layer + base unit)

(8-inch base unit)

(Two 3-inch coil units — combined count)

The Extra Firm uses two identical 3-inch coil units made from 14-gauge double-tempered recycled steel, separated by an organic coconut fiber pad. The combined count reflects both units. Neither unit uses multiple wire gauges — both are uniform 14-gauge throughout for maximum firmness and load capacity.

Individually wrapped coils — also called pocketed coils — are steel springs that are each encased in their own fabric pocket rather than connected to neighboring coils in a grid. In a traditional interconnected coil system, movement in one part of the mattress spreads across the entire surface. Individually wrapped coils move independently, so each one responds only to the pressure directly above it. The result is more precise contouring to your body shape, significantly less motion transfer between sleep partners, and a sleep surface that doesn't shift when one person moves.

Bonnell springs are the oldest and most common coil design in mattresses — hourglass-shaped steel springs connected to each other by a continuous wire frame. Because they're linked, movement anywhere on the mattress travels across the entire surface. They're inexpensive to manufacture, which is why they're still widely used, including in some mattresses that are otherwise positioned as premium.

Individually wrapped coils are each encased in their own fabric pocket and not connected to neighboring coils. They move independently, so pressure in one area doesn't transfer to another. This produces better motion isolation, more precise body contouring, and a sleep surface that responds to you rather than to the whole bed.

Some mattresses combine both systems — a Bonnell unit for base support and a pocketed coil layer above it for comfort. The Bonnell unit still governs the base's motion-transfer characteristics, which limit what the pocketed comfort layer can offset.

Every Avocado innerspring mattress uses individually wrapped coils exclusively — no Bonnell units at any layer.

Unlike solid foam, which blocks air movement entirely, individually wrapped coil units are mostly open space. Air moves freely between and around each encased spring throughout the night, preventing the heat buildup that foam mattresses are known for. Combined with organic wool — which actively wicks moisture — and organic latex, which has an open-cell structure that breathes naturally, Avocado mattresses cool through material design rather than gimmicks like blue gel layers or chemical cooling treatments.

Not necessarily — though more coils do cost more to produce. Coil count is one factor in performance, but wire gauge, coil height, encasement quality, and zone architecture matter at least as much. A high coil count in a poorly zoned design performs worse than a lower count in a well-engineered one.

Where coil count genuinely matters: a second micro-coil comfort layer, as used in the Luxury Pillow-Top, Luxury Box-Top, and Wool Mattress, adds body contouring and motion isolation because smaller, more numerous coils respond to finer differences in body shape. That's a meaningful upgrade. But comparing total counts across different models or brands as a simple quality ranking doesn't hold up — the Avocado Firm uses a newer coil design with fewer but differently engineered coils than the Medium, and it performs better for its intended purpose.

Wire gauge measures the thickness of the steel used in each coil. Counterintuitively, a lower gauge number means thicker wire — and a firmer, more durable coil. A higher gauge number means thinner wire, which creates a softer, more responsive coil. Avocado uses multiple wire gauges within a single mattress, varying firmness by zone: thicker-gauge coils in the perimeter, shoulder, and leg zones for structural support and edge stability; slightly thinner-gauge coils through the center hip zone for pressure relief. The specific gauge combinations differ by model.

Most mattress brands — including many marketed as premium — use unzoned coil units, where every spring is identical regardless of where it sits in the mattress. A small number of brands use zoned systems, and of those, most reinforce only the two long sides. Avocado reinforces all four sides: left, right, head, and foot. That produces seven zones and means edge support runs consistently around the entire perimeter — not just where you're most likely to roll off, but also at the head and foot where the mattress structure is most likely to compress and degrade over time.

The practical difference: the head and foot of the mattress retain their shape and firmness over time; the sleep surface stays consistent from edge to edge; and rotating the mattress — which Avocado recommends regularly — evenly extends the life of the interior zones because the head and foot coil zones are identical.

A base coil unit is the primary support system in an innerspring mattress — typically 8 inches tall in Avocado models, engineered for spinal alignment, durability, and load-bearing support. A micro-coil layer is a second, much shallower unit — 1 inch tall in Avocado's case — positioned above the base unit in the comfort zone. Because the coils are smaller and more numerous, they respond to finer body contours and improve motion isolation between sleep partners. Think of the base unit as structural and the micro-coil layer as responsive. The Luxury Pillow-Top, Luxury Box-Top, and Wool Mattress all use both layers.

The fabric encasement is what allows each coil to move independently — it physically separates each spring from its neighbors. Avocado uses food-grade, non-woven, non-toxic polypropylene for the encasement. Food-grade means it meets the same material standards used for food contact surfaces — no plasticizers, no off-gassing compounds. The encasement is also part of why the innerspring unit passes OEKO-TEX® Standard 100 Class I, EWG Verified®, MADE SAFE®, GREENGUARD Gold, and UL® Formaldehyde-Free testing — the entire finished mattress, coils included, is verified against all six finished-product standards.