Simba Hybrid 3-in-1 Duvet reviewed

The Simba Hybrid 3-in-1 Duvet is two duvets in one set: a light 3.5 tog duvet for summer and a 7 tog duvet for spring and autumn, which snap together into a 10.5 tog duvet for winter. Buyers rate it 4.8 out of 5 across 1,731 reviews, and it costs £249 for a single.

How the three settings work

Each layer is a complete duvet with its own cover, square stitching and Stratos side. Used alone, the 3.5 tog layer suits hot nights, and the 7 tog layer suits the months either side of summer. Snapped together, they give a 10.5 tog duvet, the usual all-season weight in UK bedding, for winter. You store whichever layer you are not using in the bag supplied. Both layers are full size, so the set does not split down the middle: a couple shares the same tog, and it will not settle a disagreement between a hot sleeper and a cold one.

The fill is Simba Renew, polyester clusters made from recycled bottles, blended with 20% modal to help air pass through. Simba says its Stratos finish tested up to 3°C cooler than untreated fabric in measurements by HeiQ in November 2020, a lab result for the fabric rather than for a night’s sleep.

Sizes and prices

Prices were read on simbasleep.com on 15 October 2026. As a double it costs £150 more than the single-weight Hybrid Duvet and £170 more than the Summer Hybrid. Delivery is free and usually next day for orders before 1pm.

Who it suits, and the drawbacks

We recommend the 3-in-1 for anyone whose bedroom changes a lot with the seasons, a loft room or a north-facing house, and for people who sleep hot in summer but feel the cold in winter. The NHS sleep advice recommends a cool bedroom, and being able to drop to 3.5 tog makes that easier on warm nights. Simba also labels it menopause-friendly, and the NHS guidance on menopause symptoms notes night sweats as a common symptom. The drawbacks are the price and the work of washing and storing two duvets. Returns follow Simba’s 30-day policy on its returns page.