The Theory • Shirts

Oreti Long Sleeve

Name: Oreti Long Sleeve
Rating: 5.00 (1 reviews)

$79.00 NZD

1 review

Color: Black

Size

S M L XL

Size Guide

The Theory Size Guide

Our size guide is designed to help you find your ideal fit in every The Theory garment. As each style is thoughtfully designed for different levels of support, movement, and comfort, the fit may vary slightly between collections.

If a garment has an oversized, relaxed, compressive, or more fitted design than our standard fit, this will always be noted in the product description to help you choose the size that's right for you.

Leggings

Leggings	S	M	L	XL	2XL
NZ/AU/UK	8	10	12	14	16
½ Waist	25.5cm	27.5cm	29.5cm	31.5cm	33.5cm
½ Hip	34cm	36cm	38cm	40cm	42cm
Full Length	85cm	86cm	87cm	88cm	89cm

Everyday Mid Short

The Theory	S	M	L	XL	2XL
NZ/AU/UK	8	10	12	14	16
Waist	50cm	54cm	58cm	62cm	66cm
Hip	72cm	76cm	80cm	84cm	88cm
Length	33.5cm	34.5cm	35.5cm	36.6cm	37.5cm

Bike Shorts

The Theory	S	M	L	XL	2XL
NZ/AU/UK	8	10	12	14	16
Waist	52cm	56cm	60cm	64cm	68cm
Hip	68cm	72cm	76cm	80cm	84cm
Length	38cm	39cm	40cm	41cm	42cm

Sports Bras

The Theory	S	M	L	XL	2XL
NZ/AU/UK	8	10	12	14	16
½ Bust	33.5cm	35.5cm	37.5cm	39.5cm	41.5cm
½ Waist Band	29.5cm	31.5cm	32.8cm	33.6cm	34.4cm

• The Millie Bra — slightly tighter shoulder strap, we suggest going up a size.
• The Tilly Bra — suited to those with a smaller chest, we suggest going up a size.

Momorangi Singlet

The Theory	XS	S	M	L	XL
NZ/AU/UK	6	8	10	12	14
½ Bust	40.5cm	43cm	45.5cm	48cm	50.5cm
Length	60.5cm	62cm	63cm	64cm	65.5cm

Tukurua Singlet

The Theory	XS	S	M	L	XL
NZ/AU/UK	6	8	10	12	14
½ Bust	43.5cm	46cm	48.5cm	51cm	53.5cm
Length	61.5cm	63cm	64cm	65cm	66.5cm

Bamboo Tops — Oreti T & Oreti Longsleeve

The Theory	S	M	L	XL
NZ/AU/UK	8	10	12	14
½ Chest	48.5cm	51cm	53.5cm	56cm
Length	61.5cm	63cm	64.5cm	66cm

Oreti Singlet

The Theory	S	M	L	XL
NZ/AU/UK	8	10	12	14
½ Chest	44cm	46cm	48cm	50cm
Length	61.5cm	63cm	64.5cm	66cm

Bamboo Skirts / Skorts

The Theory	S	M	L	XL
NZ/AU/UK	8	10	12	14
Waist	64cm	68cm	72cm	76cm
Length	39cm	40cm	41cm	42cm

Description

The Coastal Layering Essential.

Designed for effortless layering and everyday comfort, the Oreti Long Sleeve is your go-to piece for cooler days and changing seasons.

Lightweight, breathable, and beautifully soft, its relaxed fit moves with you from travel days and coastal walks to coffee catch-ups and everyday wear.

Perfect for layering or wearing on its own.

Features + Fit

Ultra soft bamboo fabric
Lightweight breathable warmth
Relaxed easy fit silhouette
Naturally temperature regulating
Soft drape finish
Moisture-wicking comfort
Designed for layering and movement

Fabric + Care

Crafted from a premium blend of 92% Bamboo and 8% Elastane, the Oreti Series delivers an ultra-soft, breathable feel designed for effortless movement and everyday comfort. Naturally lightweight and temperature regulating, the bamboo fabric offers a silky smooth finish against the skin while remaining breathable and moisture-wicking throughout the day.

The addition of elastane provides gentle stretch and flexibility, allowing each piece to move comfortably with the body while maintaining its shape wear after wear. Soft, draping, and naturally cooling, this fabric was designed for travel, lifestyle wear, low-impact movement, and relaxed everyday living.

To preserve the softness, drape, and natural performance of your bamboo garments, we recommend gentle care.

Cold gentle machine wash
Wash with similar colours
Use mild detergent only
Do not bleach
Avoid fabric softeners
Do not tumble dry
Line dry in shade
Cool iron if needed
Do not dry clean

Bamboo fabric is naturally soft and breathable, however excessive heat may damage fibres and affect the fabric’s softness over time. Air drying will help maintain the garment’s shape, drape, and luxurious feel.

For best longevity, avoid rough surfaces and abrasive fabrics that may cause pilling during wear or washing. For best results, place inside a lingerie wash bag to protect and maintain the garment’s premium construction.

Shipping