Quillah Women’s Zip Base Layer
Women’s quarter-zip base layer for polo and horse riding — built on an ancient principle.
Quillah takes its name from the quillango, the guanaco skin cape worn by the Selk’nam women of Tierra del Fuego, worn fur-side inward directly against the skin. The first garment of warmth. That same principle, a layer closest to the body that protects, breathes and moves with you, is what Quillah is built on today. A women’s long sleeve quarter-zip base layer in superwash Merino Wool, designed for the polo player and the equestrian rider in chilly conditions. Sits comfortably under polo whites. Goes straight in the machine when the day is done.
At a glance
Quillah is a women’s quarter-zip base layer in 67% Merino Wool, 22% Polyamide and 11% Elastane, weighing 160g. Designed for polo and horse riding in chilly conditions, late winter and early spring. Slim women’s fit, superwash Merino Wool, fully machine washable. Available in Basalt. Made in Italy by Ona Polo.
£125.00
The superwash treatment makes the Merino Wool fully machine washable, no shrinkage, no special handling. The natural performance properties of Merino Wool, with the practicality that polo players and riders need.
Merino Wool responds to your body, insulating when you are still, releasing heat efficiently when you are riding hard. Designed for the variable conditions of a polo match or a long morning’s ride in late winter or early spring.
Wicks perspiration away from the skin and disperses it efficiently across the fabric surface. You stay dry and comfortable whether you are warming up or riding at full pace.
Merino Wool fibre naturally inhibits bacterial growth, the cause of odour in synthetic base layers. Quillah stays fresh across multiple wears and long days at the yard without any chemical finish.
11% elastane delivers stretch in every direction and full shape recovery. Complete freedom of movement through the swing, the reach and the gallop, wear after wear, season after season.

Thermal Regulation

Moisture Management

Odour Resistance

Four-Way Stretch
Quillah Women’s Zip Base Layer Description
Quillah is a 160g superwash Merino Wool women’s quarter-zip base layer built for polo players and equestrian riders in chilly conditions. The technical blend of 67% Merino Wool, 22% Polyamide and 11% Elastane delivers natural thermal regulation, moisture management and odour resistance in a long sleeve layer that moves with the body and sits invisibly under polo whites. The slim women’s fit and flatlock seam construction leave no bulk under fine fabric. The quarter-zip gives fast temperature adjustment between chukkas. Superwash Merino Wool, fully machine washable. Named after the quillango, the guanaco skin cape of the Selk’nam women, the garment worn closest to the skin to hold warmth against the body. A principle as old as the people who carried it.
Product Features
Technical Specifications
- Composition: 67% Merino Wool / 22% Polyamide / 11% Elastane
- Fabric weight: 160g — lightweight, ideal for chilly to cool conditions
- Merino Wool grade: Superwash — fully machine washable
- Fit: Slim women’s fit — shaped for the female form, close without restriction
- Neck: Quarter-zip — precise temperature control between chukkas
- Colour: Basalt
- Origin: Made in Italy
Construction
- Women’s slim fit: shaped for the female form — sits comfortably under polo whites
- Flatlock seam construction: lies softly against the skin — no visible lines under fine fabric
- Four-way stretch fabric: unrestricted movement through swing, reach and gallop
- Quarter-zip neck: temperature control between chukkas without removing a layer
Sizing

| Ona | Chest (cm) | Chest (in) | Waist (cm) | Waist (in) | Hip (cm) | Hip (in) | UK | US | France | Spain | Germany | Italy |
| XS | 81–86 | 32–34 | 63–68 | 25–27 | 77–82 | 30–32 | 8 | 4 | 36 | 36 | 34 | 40 |
| S | 87–92 | 34–36 | 69–74 | 27–29 | 83–88 | 33–35 | 10 | 6 | 38 | 38 | 36 | 42 |
| M | 93–98 | 37–39 | 75–80 | 30–31 | 89–94 | 35–37 | 12 | 8 | 40 | 40 | 38 | 44 |
| L | 99–104 | 39–41 | 81–86 | 32–34 | 95–100 | 37–39 | 14 | 10 | 42 | 42 | 40 | 46 |
| XL | 105–110 | 41–43 | 87–92 | 34–36 | 101–106 | 40–42 | 16 | 12 | 44 | 44 | 42 | 48 |
| XXL | 111–116 | 44–46 | 93–98 | 37–39 | 107–112 | 42–44 | 18 | 14 | 46 | 46 | 44 | 50 |
Materials and Care
Composition
- 67% Merino Wool — superwash treated for full machine washability
- 22% Polyamide — durability and structure
- 11% Elastane — four-way stretch and shape recovery
Care
- Machine wash at 30°C — gentle / wool cycle
- Do not tumble dry — lay flat to dry
- Do not bleach
- Cool iron if required
- Superwash Merino Wool — no special handling required
Quillah Women’s Zip Base Layer FAQs
Is this base layer suitable for polo, horse riding and other outdoor activities?
What is it made from?
How should it fit?
Will it show under polo whites?
Why is it called Quillah?
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