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The Sonoro Kate is a quilted bamboo-fabric mattress topper with 900GSM down-alternative fill, about 2 inches thick. It is OEKO-TEX certified and has a 360° elastic skirt that fits mattresses 8 to 21 inches deep. It is machine washable and aimed at hot sleepers and firm or aging mattresses. The best new price is $33.49 at Walmart as of November 6, 2026, the only new price listed.
In stockSold by SONORO KATEReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
Also available at
Lowest price we've seen: $33.49 on Nov 6 at Walmart. Tracked across 1 store since Nov 6.
Rated 4.2 out of 5 from 360 ratings. Buyers mostly like the plush feel and the deep pocket fit; some say it is thinner than expected and shifts or flattens with use.
The Sonoro Kate Bamboo Mattress Topper elevates sleep comfort with OEKO-TEX certified natural bamboo fabric that naturally dissipates heat and a premium 900GSM down-alternative fill for cloud-like cushioning—transforming firm mattresses into pressure-relieving surfaces. Acting as both a protective mattress pad and comfort-focused topper, its breathable bamboo fibers and micro-ventilation design promote continuous airflow to reduce night sweats, while the dense 900GSM padding (triple the loft of standard fills) cradles hips, shoulders, and back for spinal alignment in any sleep position. The 360° deep-pocket skirt (fits 8"-21" mattresses) stays securely anchored, and its machine-washable construction maintains integrity through repeated washes. Ideal for hot sleepers seeking temperature regulation, or anyone upgrading an aging mattress, this dual-purpose layer delivers hotel-grade plushness without compromising support. Unlike heat-trapping memory foam, Sonoro Kate’s bamboo mattress protector offers cool, durable comfort—renewing your sleep surface affordably.
