<h2>Thread + Light — des créations qui changent avec le soleil.</h2> <h2>Thread + Light — des créations qui changent avec le soleil.</h2>

Thread + Light — des créations qui changent avec le soleil.

From UV-reactive embroidery that reveals hidden color in sunlight to 22-momme mulberry silk made for quieter nights, every SunnySass piece begins with thoughtful materials, careful construction, and details you can see and feel.

TWO WORLDS. ONE APPROACH.

Made for light.
Made for rest.

SunnySass creates everyday pieces around two very different moments: stepping into the sunlight and slowing down at night. What connects them is the same attention to material, function, and the small details that make an ordinary routine feel more personal.
Two different moments, connected by the same attention to material, function, and thoughtful detail.
SunnySass UV-reactive embroidery before and after sunlight exposure SunnySass UV-reactive embroidery before and after sunlight exposure

MASTER THE LIGHT

Embroidery designed to respond.

Dense dimensional embroidery is combined with selectively placed UV-reactive thread, allowing hidden color to appear only where the design calls for it.
EXPLORE SUNLIT CRAFT
SunnySass 22-momme mulberry silk sleep mask on soft bedding SunnySass 22-momme mulberry silk sleep mask on soft bedding

HONOR THE NIGHT

Comfort shaped with intention.

22-momme mulberry silk, a softly filled construction, shaped eye space, and considered coverage come together to make rest feel calmer and more comfortable.
EXPLORE MOONLIGHT CRAFT

SUNLIT CRAFT · 01

The color lives in the thread.

The sunlight reveal is not printed or coated onto the finished tee. Selected areas of the artwork are embroidered with UV-reactive thread, while the surrounding details remain in stable embroidery colors.

When exposed to ultraviolet light, the reactive thread reveals a soft golden tone. Away from strong UV, it gradually returns toward its quieter original appearance.

STABLE EMBROIDERY

SunnySass embroidery in its stable indoor appearance
Regular embroidery thread forms the bear, backpack, lettering, and the areas intended to stay unchanged.

UV-REACTIVE DETAILS

Selected UV-reactive mountain embroidery areas
Photochromic embroidery thread is placed only in selected mountain areas, so the reveal follows the original design.

SUNLIGHT REVEAL

SunnySass embroidery revealing soft golden color in sunlight
Under sufficient UV exposure, the selected threads reveal a soft golden color while the rest of the embroidery stays visually consistent.
WHAT TO KNOW
UV intensity affects the speed and strength of the reveal.
UV-reactive, not glow-in-the-dark.
Colors may vary slightly across lighting conditions and screens.

SUNLIT CRAFT · 02

FROM DESIGN TO SUNLIGHT

Every reveal begins with a plan.

The sunlight effect is planned before the first stitch is made. Machine embroidery builds the stable artwork while leaving the selected mountain zones open. White UV-reactive thread is then added by hand, and the finished reveal is checked under ultraviolet light.

01

DESIGN THE REVEAL

Map the changing areas

The artwork is divided into stable and UV-reactive zones, deciding exactly where the soft golden color will appear.
SunnySass embroidery design showing the selected UV-reactive mountain zones
UV-REACTIVE ZONE
02

BUILD THE EMBROIDERY

Create the textured base

Dense machine embroidery builds the bear, landscape, lettering, and stable areas while leaving the selected mountain zones unstitched for the UV-reactive thread.
Machine embroidery building the stable SunnySass design while leaving the selected mountain zones open Machine embroidery building the stable SunnySass design while leaving the selected mountain zones open
03

ADD THE UV DETAILS

Finish selected areas by hand

White UV-reactive embroidery thread is added by hand in the reserved mountain areas. Before UV exposure, it remains white and blends into the original design.
White UV-reactive embroidery thread being added by hand to the selected mountain areas White UV-reactive embroidery thread being added by hand to the selected mountain areas
04

CHECK UNDER UV

Inspect the final reveal

A UV flashlight is used to check the final response. Under ultraviolet light, the selected white threads reveal a soft golden tone as intended.
UV flashlight testing the SunnySass embroidery as the selected mountain threads reveal soft golden color UV flashlight testing the SunnySass embroidery as the selected mountain threads reveal soft golden color
SunnySass UV-reactive embroidery shown in shade and sunlight

SUNLIT CRAFT · 03

The reveal in real life.

In indoor light or shade, the selected mountain areas remain close to their original white appearance. Under sufficient ultraviolet light, those threads gradually reveal a soft golden tone.

The strength and speed of the change depend on UV intensity, exposure time, weather, season, and surrounding conditions. When UV exposure is reduced, the color gradually returns toward its quieter original state.

01

IN SHADE

Quiet and understated

Indoors or away from strong UV, the reactive mountain details remain white and blend into the original embroidery.

02

IN SUNLIGHT

Soft gold appears

Under sufficient UV exposure, the selected white threads gradually reveal a soft golden color.

03

BACK IN SHADE

The color gradually returns

Once strong UV exposure is reduced, the reactive thread gradually returns toward its original lighter appearance.

UV-reactive, not glow-in-the-dark.

Direct sunlight usually creates a stronger reveal than indoor light or shade.

Color may appear slightly different across weather conditions, cameras, and screens.

Forest green SunnySass silk sleep mask shown from the front and back

MOONLIGHT CRAFT · 01

Comfort, layered in silk.

Comfort begins with what touches the skin—and what rests inside.

SunnySass combines smooth 22-momme mulberry silk with pure silk-fiber filling for a soft, lightweight feel. Its broad silhouette helps reduce surrounding light, while the adjustable silk-wrapped strap lets you tailor the fit.

01

Smooth against the skin

Grade 6A, 22-momme mulberry silk feels smooth and gentle against the skin.

02

Silk, inside and out

Silk outer and skin-facing surfaces are paired with 100% pure silk-fiber filling.

03

Soft without feeling bulky

The silk-filled construction adds gentle cushioning while keeping the mask lightweight.

04

Coverage for a darker rest

The broad 21 × 9 cm silhouette helps cover the eye area and reduce surrounding light.

05

A fit you can adjust

The adjustable elastic strap is wrapped in silk for a smoother, more adaptable fit.

22 MOMME SILK

Smooth and substantial.

GRADE 6A

Premium mulberry silk.

PURE SILK FILLING

No synthetic filling.

21 × 9 CM

Broad eye-area coverage.

MOONLIGHT CRAFT · 02

What rests inside matters.

Our sleep mask is thoughtfully crafted with 22-momme Grade 6A mulberry silk, pure silk-fiber padding, and hand-finished construction—designed for a soft, lightweight feel you can look forward to, night after night.

Close-up of forest green 22-momme mulberry silk Close-up of forest green 22-momme mulberry silk

01 · THE SURFACE

22-momme mulberry silk

Grade 6A mulberry silk creates a smooth, soft-touch surface with a substantial yet lightweight feel.

Forest green silk sleep mask beside pure silk-fiber filling Forest green silk sleep mask beside pure silk-fiber filling

02 · THE CENTER

Pure silk-fiber filling

The softly padded interior is filled with pure silk fiber—no synthetic filling added.

Close-up of the finished edge and silk-wrapped strap of the sleep mask Close-up of the finished edge and silk-wrapped strap of the sleep mask

03 · THE FINISH

Finished by hand

Each mask is individually hand-finished to keep the edges, silk layers, and overall shape neatly refined.

22 MOMME

Smooth and substantial silk

GRADE 6A

Premium mulberry silk

PURE SILK FILLING

No synthetic filling added

OEKO-TEX® STANDARD 100

Tested for harmful substances

MOONLIGHT CRAFT · 03

Made for real nights.

From winding down at home to resting while you travel, a sleep mask should feel simple to use and easy to make your own.

The broad silk-covered shape helps reduce surrounding light, while the adjustable strap lets you fine-tune the fit for your own comfort.

Woman resting at night while wearing a forest green SunnySass silk sleep mask Woman resting at night while wearing a forest green SunnySass silk sleep mask
01

ADJUST THE FIT

Find your comfortable tension

Loosen or secure the adjustable silk-wrapped strap until the mask rests comfortably without feeling unnecessarily tight.

02

SOFTEN THE LIGHT

Broad coverage for a darker rest

The 21 × 9 cm silhouette covers the eye area broadly and helps reduce surrounding light during sleep, naps, and travel.

03

CARE FOR THE SILK

Gentle care, night after night

Hand wash gently in cool water with a silk-friendly detergent. Avoid wringing, bleaching, and tumble drying, then reshape and dry naturally away from direct sunlight.

THE CRAFT, TOGETHER

Made for the light. Crafted for the night.

Two everyday pieces, created for two different moments. One reveals a little wonder in the sunlight. The other brings softness and calm to the night.

SunnySass Sunlit Peaks Tee revealing soft golden embroidery in sunlight SunnySass Sunlit Peaks Tee revealing soft golden embroidery in sunlight

SUNLIT

A little sunshine magic you can wear.

Detailed embroidery stays understated in the shade, then reveals a soft golden change under sufficient UV light.

UV-Reactive Embroidery Detailed Stitchwork Soft Golden Reveal
Woman resting at night while wearing a forest green SunnySass silk sleep mask Woman resting at night while wearing a forest green SunnySass silk sleep mask

MOONLIGHT

Softness made for quieter nights.

Smooth mulberry silk, pure silk-fiber filling, and an adjustable fit come together for a softer nighttime ritual.

22-Momme Mulberry Silk Pure Silk-Fiber Filling Adjustable Fit

Connexion

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