Olivia Rocco Oslo Black Super Soft Flannel Duvet Cover Set with Pillowcases

Bold. Warm. Unapologetically Black.

The Olivia Rocco Oslo Black Super Soft Flannel Duvet Cover Set is for bedrooms that mean business. The deep, rich black colourway brings a dramatic, sophisticated energy to the bed that works equally well in minimalist, industrial, and maximalist interior schemes — while the 100% polyester flannel fabric delivers the enveloping warmth and softness that makes cold nights genuinely something to look forward to. OEKO-TEX certified and designed in England. Winter bedding with real presence.

100% Polyester Flannel Fabric

Made from premium 100% polyester flannel, this duvet cover set is engineered for warmth, softness, and durability. The brushed flannel surface creates a plush, velvety texture that feels exceptional against the skin and retains its softness wash after wash. OEKO-TEX certified, the fabric has been independently tested and verified to be free from harmful substances — safe for the whole family, including those with sensitive skin.

Oslo Black Colourway

The Oslo Black is a deep, true black with a richness that anchors the bedroom and makes every other element in the room feel more considered. It pairs beautifully with white, grey, gold, and copper accents, and works across a wide range of interior styles from Scandi to maximalist. Part of the wider Oslo flannel collection, also available in Sapphire.

Sizes & Dimensions

Each set includes one duvet cover and the corresponding number of pillowcases, available in the following sizes:

• Single — duvet cover 135 x 200 cm, one pillowcase 50 x 75 cm
• Double — duvet cover 200 x 200 cm, two pillowcases 50 x 75 cm
• King — duvet cover 230 x 220 cm, two pillowcases 50 x 75 cm

How to Use

Insert your duvet through the opening at the base of the cover and secure using the button fastening. Shake to distribute evenly and smooth into the corners. Dress with the included pillowcases and layer with a throw or cushions for a fully dressed winter bed.

Care Guide

Machine washable — please follow the care instructions on the packaging to preserve the softness and quality of the flannel. Wash with similar colours. Do not bleach or tumble dry on high heat.

Why Olivia Rocco

Designed in England with a commitment to quality, considered design, and lasting warmth, Olivia Rocco bedding is backed by a manufacturer's warranty and dedicated customer support. The Oslo collection is made for bedrooms that take winter seriously — and for customers who know that black is never just a colour.