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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
Superwash Merino Wool
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.
Natural Thermal Regulation
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.
Moisture Management & Breathability
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.
Natural Odour Resistance
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.
Four-Way Stretch
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
Women’s quarter-zip fits true to size. If you are between sizes, we recommend sizing up. 
| 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?
Yes — Quillah is designed specifically for polo players and equestrian riders but performs well for any outdoor activity in chilly conditions. The slim women’s quarter-zip fit sits invisibly under polo whites, the four-way stretch moves freely with the body, and the Merino Wool keeps you comfortable whatever the sport or activity.
What is it made from?
Quillah is made from 67% Merino Wool, 22% Polyamide and 11% Elastane. The Merino Wool is superwash treated, making it fully machine washable. The fabric weighs 160g — lightweight and ideal for chilly to cool conditions in late winter and early spring.
How should it fit?
Quillah is cut in a slim women’s fit — close to the body and shaped for the female form, designed to sit next to the skin without restriction or excess fabric under polo whites. If you are between sizes, we recommend sizing up.
Will it show under polo whites?
No. Quillah is designed with a slim women’s fit and flatlock seaming to sit completely flat and invisible under polo whites. There are no raised seams or bulk.
Why is it called Quillah?
Quillah is drawn from the quillango — the guanaco skin cape of the Selk’nam people of Tierra del Fuego, worn fur-side inward directly against the body. It was the first garment of warmth — the layer closest to the skin. That is what Quillah is today.
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