Round Cantilever Umbrella 3.5m Black - Vented Canopy | Ostro

True black, in a full circle. Not the warm charcoal of anthracite — an uncompromising, flat black that turns the canopy itself into a design statement. The Ostro is the round cantilever umbrella for outdoor spaces that are deliberately composed: a circular ceiling of deep, even shade above the pool deck, the entertaining terrace or the outdoor dining table, that reads as an architectural feature as much as a practical one.

The metal mast rises at an angle from the 100 x 100 cm cross base, keeping the space beneath the canopy clear. Eight steel ribs support the round canopy across its full 3.5 metre span. An air vent at the crown allows some air and heat to pass through the canopy.

The crank opens and closes the canopy cleanly, and the canopy tilts to cut low-angle sun as it drops through the afternoon. On a north or west-facing outdoor area, that tilt is the feature that extends usable shade from mid-morning through to sunset — without it, a fixed canopy loses its effectiveness as the sun descends and the light angle shifts.

A 3.5m black round cantilever umbrella for pools, patios and contemporary outdoor spaces

The Ostro opens to a round canopy of 350cm diameter — approximately 9.6m² of shade. The circular form covers a round outdoor dining table without exposed corners, shelters a poolside lounge setting with a profile that follows the natural curves of a pool deck, or anchors a freeform outdoor entertaining area with a defined overhead zone that feels purposeful rather than provisional. The UV-protective, anti-fade polyester holds its deep black tone through multiple seasons of direct Australian sun — black being among the most UV-stable tones in the outdoor colour palette, holding its depth where lighter colours gradually pale.

The 100 x 100 cm cross base is included. Follow the supplied installation instructions and use suitable ballast or anchoring where required for the installation surface and site conditions. For open or elevated positions with consistent wind exposure, pairing the Ostro with additional ballast from our Umbrella Bases & Weights collection is recommended.

Ø 350 cm
~9.6m² of shade | 268cm overall height | 100x100cm cross base included

To compare colours within the same round 3.5m format, discover the Gregal in anthracite, the Bora in taupe, the Marin in blue and the Zephyr in sand white. To explore the full range, browse our Large Cantilever Umbrellas and Round Cantilever Umbrellas collections.

Black in the Australian outdoor setting

Black outdoor design has become a defining element of contemporary Australian architecture and landscaping — and for good reason. Against white rendered walls or pale limestone paving, a black canopy reads as a graphic, deliberate contrast; above dark hardwood or charcoal composite decking, it creates tonal depth without heaviness; around a pool, it frames the water rather than competing with it, turning the shade zone into the visual anchor of the whole outdoor space.

The practical case for black is as strong as the aesthetic one. Dark tones absorb rather than reflect harsh glare, creating a softer visual environment beneath the canopy. They show dust, pollen and debris less than pale alternatives — a meaningful advantage in garden and pool settings where airborne material is a constant. And in the long run, black holds its identity across seasons where ivory, sand and even anthracite shift perceptibly under sustained UV exposure.

At a glance

Round canopy 350cm diameter, approximately 9.6m² of shade, 268cm overall height. Metal mast, 8 steel ribs. Crank mechanism with adjustable tilt. Air vent. UV-protective anti-fade polyester canopy, black. 100x100cm cross base included. Assembly required. The canopy is not fully waterproof — treat with a waterproofing spray for wet conditions.

Delivery:

Each order is prepared and dispatched by our team within 24 to 48 hours (excluding weekends and public holidays). Delivery then takes 4 to 6 business days, depending on your location and the delivery method selected.

The estimated total delivery time is therefore 5 to 8 business days.

Returns:

You have 14 days from receipt to return your order to us. It must be in perfect condition, unused and in its original packaging. For more information, please see our Return and Refund Policy.

Our team is available from Monday to Friday, 9am to 6pm (excluding weekends and public holidays).

Email: info@shadelys.com
Phone: +61 2 5119 4874