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FABRIC INNOVATION

At the core of SAISEI is fabric innovation.

Each material is custom developed with intention - balancing comfort, durability, and an elevated hand feel. Guided by our pursuit of better, we focus on refined yarns, proprietary fabrications, and seamless innovation to create fabrics that move naturally with the body and hold their shape over time.

These fabrics form the foundation of every SAISEI piece, supporting timeless silhouettes with ease, comfort, and quiet distinction.

Essential Intimates

Within our foundation collection, Essential Intimates is engineered to feel weightless on the body, with a soft, buttery hand that wears like a true second skin. Developed through seamless knitting using recycled yarns, the fabric gently contours the body while delivering calibrated support without pressure.

Light, smooth, and barely there. The fabric hugs the body softly with gentle stretch and breathability, designed to move naturally without sensation or restriction.

Designed to be worn closest to the skin as the invisible base of your wardrobe. Ideal under tailoring, knits, and everyday layers—pieces that disappear once on while providing all-day comfort and ease.

  • Seamless construction
  • Calibrated support without compression
  • Moisture-wicking
  • Peppermint oil infusion for lasting freshness
  • Composition: 83% Recycled Nylon, 17% Recycled Elastane

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Essential Body

Part of our foundation collection, Essential Body offers an elevated second-skin fabrication designed for everyday ease and refined comfort. Constructed from recycled yarns, it provides fluid drape with slightly more weight and support than Essential Intimates.

Soft, buttery and offers gentle stretch, light structure, and a smooth hand feel that balances comfort with subtle support.

Designed for everyday wear - both to be seen and easily layered. Created for ease across lounging, travel, and as you’re out and about. Meant to be worn on its own or as a visible base layer, transitioning effortlessly from home to work, outings, and everyday moments in between.

  • Seamless construction
  • Slightly heavier weight than Essential Intimates
  • Moisture-wicking
  • Peppermint oil infusion for freshness
  • Composition: 90% Recycled Nylon, 10% Spandex

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Essential Movement

The Core Essential Movement seamless fabric is engineered to support the body through motion, combining technical precision with lightweight, supportive comfort. Made from recycled CiCLO® nylon yarns for durability and performance with reduced environmental impact.

Body-holding compression without restriction. Supportive, flexible, and breathable - designed to move with the body during medium-impact activity.

Designed for active movement and extended wear for all medium-impact activities. Ideal for yoga, pilates, studio training, walking, and everyday motion when you want extra support - worn alone or layered, transitioning seamlessly from movement to recovery.

  • Seamless Construction
  • Medium-impact support
  • Flexible compression
  • Moisture-wicking
  • Peppermint oil infusion
  • Biodegradable fiber technology
  • Composition: 96% CiCLO® Nylon, 4% Recycled Elastane

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Luxe Mélange

Luxe Mélange is a medium-weight seamless fabric designed to elevate everyday wear through thoughtful fiber blending and refined texture. It combines organic cotton softness with recycled nylon and elastane for stretch and recovery.

Cocooning the body with soft with breathable warmth. Gently brushed on the interior for comfort, with a matte, dry-touch micro rib exterior that adds subtle structure and visual depth.

Made to be seen. Designed to be seen through everyday layering and transitional dressing. Ideal for travel and life on the move - comfortable enough for home, yet polished and elevated to wear out and about.

  • Seamless construction
  • Mid-weight
  • Soft brushed interior, micro rib exterior
  • Natural stretch and recovery
  • Breathable warmth
  • Composition: 55% Organic Cotton, 37% Recycled Nylon, 8% Recycled Elastane

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Rib

Our Rib fabric introduces dimension, softness, and adaptability through a refined seamless rib construction. Lenzing™ Modal delivers fluid softness, while recycled nylon and elastane ensure durability and shape retention.

Soft with subtle compression. Breathable, flexible, and body-contouring with tactile texture and a polished second-skin feel.

Designed for everyday wear, whether at home or out and about. Worn visibly on its own or layered under knits and outer layers for added texture and dimension.

  • Seamless rib construction
  • Moisture-wicking
  • Natural antibacterial properties
  • Peppermint oil infusion
  • Composition: 52% Lenzing™ Modal, 42% Recycled Nylon, 6% Recycled Elastane

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French Terry

Our lightweight French Terry is designed for everyday wear with comfort and versatility at its core. Blending organic cotton with recycled polyester, it offers warmth without bulk and a soft, lived-in feel.

Relaxed and breathable with natural stretch. Smooth on the outside with a soft looped interior for lightweight warmth.

Designed for casual dressing, travel, and layering. Easy to wear over foundation pieces and across seasons, offering everyday ease and comfort.

  • Cut & sew construction
  • Organic cotton blend
  • Soft looped interior
  • Breathable and shape-retaining
  • Mid-weight warmth
  • Composition: 70% Organic Cotton, 30% Recycled Polyester

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Knitwear

Our Knit fabric is thoughtfully engineered to balance natural softness, lightweight warmth, and durability. A blend of cotton, viscose, wool, cashmere, and nylon creates a refined yet wearable knit.

Warm without weight. Soft against the skin with gentle stretch, breathability, and structure that holds through wear.

Designed for life in motion and made to be seen. Layers easily over foundation pieces and under outer layers, transitioning from relaxed to more elevated styling.

  • Cut & sew construction
  • Multi-fiber blend for softness and resilience
  • Lightweight warmth
  • Breathable with gentle stretch
  • Durable shape retention
  • Composition: 37% Cotton, 28% Nylon, 25% Viscose, 7% Wool, 3% Cashmere

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Measurement XS
US 0–2		 S
US 2–4		 M
US 6–8		 L
US 10–12		 XL
US 14–16
Waist (in) 25-27 27-29 29-31 31-37 37-40
Hip (in) 34-36 36-38 38-40 40-43 43-46
Chest (in) 32-34 34-36 36-38 38-40 40-42.5
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