Simba TripleShield Bamboo Mattress Protector reviewed

The Simba TripleShield Bamboo Mattress Protector is a waterproof protector with a bamboo-rayon jersey top and a TPU backing, for mattresses up to 40cm deep. It is the cheapest protector Simba sells, from a regular £49 for a single, and Simba states it withstands more than 1,500mm in a hydrostatic-head test.

What is it made of?

The specification is from Simba’s UK product page. Simba does not state the country of manufacture.

How waterproof is it?

Enough for everyday spills and accidents. A hydrostatic-pressure test measures how much water pressure a fabric resists before water passes through it; the method is set out in the textile standard that BSI publishes as BS EN ISO 811. Simba quotes a result above 1,500mm under BS EN ISO 20811, which it says covers most spills and accidents. Simba also lists the protector as breathable, with the bamboo fibre meant to keep the surface cool, although it publishes no airflow figure for it. The TPU layer does the waterproofing, while the jersey top keeps it from feeling or sounding plasticky, and Simba describes it as silent in use.

Who should buy it?

Anyone protecting a new mattress on a budget, families with young children and pet owners. For children the case is practical: the NHS notes that many children under 5 wet the bed, and its advice for home includes waterproof covers on the mattress and duvet. Simba says a protector is required to keep its 10-year mattress guarantee valid, which makes the cheapest waterproof option the logical default. It adds no padding and no anti-dust-mite treatment is listed; for those, the Quilted Performance costs 61% more in a single.

Will it fit?

The 40cm skirt covers every Simba mattress, including the 34cm Hybrid Ultra, and most mattresses from other brands. It matters most on the Natural Hybrid Source and Apex, which Simba sells with non-removable covers, so a spill on an unprotected mattress stays there. Being thin and unpadded, the Bamboo protector changes the feel of the mattress less than the quilted model.

Sizes and prices

Regular prices at the time of writing (September 2026), including the continental sizes.

Care is easy: machine wash separately on a gentle cycle with mild detergent and tumble dry on low heat. Delivery is free to most of the UK. The protector is not part of Simba’s 200-night mattress trial; it can be returned within 30 days under Simba’s returns policy for items that are not mattresses, and no guarantee period is published.