UNIQLO x Princesse tam.tam Extra Warm HEATTECH Cashmere Blend Ribbed U-Neck Long Sleeve Top

UNIQLO x Princesse tam.tam | Extra Warm HEATTECH Cashmere Blend Ribbed U-Neck Top

Winter warmth does not have to come at the expense of effortless style. The UNIQLO x Princesse tam.tam Extra Warm HEATTECH Cashmere Blend Ribbed U-Neck Top brings together UNIQLO's innovative thermal technology and the refined femininity of French lingerie brand Princesse tam.tam, transforming an everyday thermal essential into an elegant layering piece.

Made with an Extra Warm HEATTECH fabric containing 5% cashmere, this top combines moisture-absorbing, heat-generating and heat-retaining properties. According to UNIQLO, Extra Warm HEATTECH provides approximately 1.5 times the warmth of regular HEATTECH, while maintaining a lightweight, soft and flexible feel.

Unlike conventional plain thermal underwear, this design features a textured ribbed fabric, delicate satin-trimmed U-neckline and slightly longer sleeves. Its compact, body-skimming fit makes it ideal for layering under knitwear, shirts and jackets, while the refined neckline and cuffs can also become subtle styling details.

UNIQLO x Princesse tam.tam | French Elegance Meets Japanese Thermal Innovation

Princesse tam.tam is a French lingerie and lifestyle brand known for celebrating individuality, comfort and femininity. With its distinctive prints, expressive colours and thoughtful approach to design, the brand offers lingerie, loungewear and swimwear that allow women to feel comfortable expressing their personal style.

This collaboration combines Princesse tam.tam's refined lingerie-inspired details with UNIQLO's practical HEATTECH technology. From the satin neckline to the soft ribbed texture, the collection brings an elevated sense of style to functional winter essentials.

Key Features

• Extra Warm HEATTECH Technology:
  Moisture-absorbing, heat-generating and heat-retaining fabric that provides approximately 1.5 times the warmth of regular HEATTECH.
• 5% Cashmere Blend:
  Cashmere is blended with functional fibres to create a soft, comfortable fabric suitable for everyday winter layering.
• Elegant Satin-Trimmed U-Neckline:
  A delicate satin finish around the neckline adds a subtle, feminine accent to the minimalist design.
• Textured Ribbed Fabric:
  The raised ribbed texture adds visual dimension, making the top suitable for both concealed layering and visible styling.
• Flexible, Body-Skimming Fit:
  Stretch fabric provides freedom of movement while maintaining a compact silhouette that layers comfortably under other garments.
• Slightly Longer Sleeves:
  Designed with subtly extended sleeves that can be styled to show beneath knitwear or jacket cuffs.
• Versatile Winter Essential:
  Wear under sweaters, cardigans, shirts or coats, or style as a fitted long-sleeve top.
• French Brand Collaboration:
  Combines UNIQLO's functional winterwear expertise with the refined design philosophy of Princesse tam.tam.

More Than Thermal Underwear

Most thermal base layers are designed primarily for warmth and are intended to remain hidden beneath clothing. This cashmere-blend ribbed U-neck top offers a more considered approach, with special attention to the neckline, fabric texture and sleeve proportions.

The satin-trimmed neckline creates a soft, refined frame, while the ribbed fabric adds depth and texture. Paired with a simple cardigan, shirt or knitted jacket, it brings an understated sense of French elegance to everyday winter dressing.

For those who prefer a lighter, more streamlined winter wardrobe without compromising on warmth, this top offers a practical balance of thermal performance, comfort and style.

Extra Warm HEATTECH | Lightweight Warmth

UNIQLO Extra Warm HEATTECH uses fabric with moisture-absorbing, heat-generating and heat-retaining properties to provide additional comfort in colder weather.

According to UNIQLO, Extra Warm HEATTECH offers approximately 1.5 times the warmth of regular HEATTECH, based on CLO thermal resistance measurements.

UNIQLO's suggested temperature range is approximately -5°C to 15°C when worn together with other clothing. This is a general reference, and individual warmth perception may vary depending on activity, personal comfort and layering.

Styling Ideas

• Everyday Winter Layering: Wear under sweaters, knitwear and coats for additional warmth.
• Office & Indoor Outfits: Pair with a cardigan or shirt for a comfortable, polished appearance.
• Winter Travel: Ideal for city breaks, sightseeing and layering during colder journeys.
• Understated French Styling: Allow the satin neckline or slightly longer cuffs to show for a refined finishing touch.

Fabric Composition

Main Fabric:

• 56% Acrylic
• 33% Rayon
• 6% Polyurethane
• 5% Cashmere

Neckline Trim:

• 79% Nylon
• 21% Polyurethane

Product Specifications

• Brand: UNIQLO
• Collaboration: Princesse tam.tam (France)
• Product Name: Extra Warm HEATTECH Cashmere Blend Ribbed U-Neck Top
• Product Type: Women's Thermal Long-Sleeve Top / Base Layer
• Neckline: U-Neck
• Sleeves: Long Sleeves, Slightly Extended Length
• Fabric: Stretch Ribbed Cashmere Blend
• Cashmere Content: 5%
• Thermal Collection: Extra Warm HEATTECH
• Available Sizes: XS, S, M, L, XL, XXL, 3XL
• Product Code: 488585
• Country of Manufacture: Vietnam

Care Instructions

• Machine washable. Follow the garment care label for the appropriate washing cycle.
• Do not dry clean.
• Do not tumble dry.
• Avoid washing with items that may snag or damage the ribbed fabric.
• Always refer to the actual garment care label for detailed washing and drying instructions.

Notes & Precautions

• This is a cashmere-blend garment containing 5% cashmere. It is not made from 100% cashmere.
• The approximately 1.5-times warmth comparison is based on CLO thermal resistance measurements against regular HEATTECH, not a direct measurement of perceived body temperature.
• The suggested temperature range assumes layering with other clothing. Individual warmth perception may vary.
• The stretch ribbed fabric has a body-skimming fit. Please refer to the size chart and your preferred fit when selecting a size.
• Actual colours may vary depending on lighting and screen settings.
• This product is a collaboration between UNIQLO and French brand Princesse tam.tam. It is manufactured in Vietnam.
• Refer to the actual product label for the most accurate fabric and care information.