SilkFlex Convertible Baby Sleep Bag

Inspired by one of our best-selling designs in Japan, this convertible baby sleep bag grows with babies through adjustable snap closures, combining premium mulberry silk, breathable cotton gauze, and moisture-managing filling for comfortable spring and summer sleep.

Suitable For Infant Toddler

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Product Details

What Makes It Special

Adjustable Three-Stage Fit

Multiple snap buttons at the shoulders, waist, and hips allow the sleep bag to adapt as babies grow, providing a secure swaddled fit for infants and a wearable sleeping bag for older babies.

Premium Silk Sleeping Surface

The outer layer features 19 momme mulberry silk, paired with breathable cotton gauze lining and Dacron™ Air-Thru polyfill to deliver smooth comfort, efficient moisture management, and lightweight warmth.

Seasonal Collection Flexibility

Beyond the silk version, the same design can be developed with four-layer gauze, six-layer gauze, quilted cotton gauze, or cooling fabrics, allowing brands to build complete seasonal product collections.

Proven Japanese Market Design

Successfully supplied to the Japanese market, this mature design combines premium materials, practical adjustability, and long-term consumer acceptance, making it suitable for premium export collections.

Specifications

Product Specifications

Product Code

FBS-4B

Product Size

60 cm x 46 cm x 3 cm

(L x W x H)

Net Weight

155 g

Single Pack

box packed

26 cm x 22 cm x 5 cm

(L x W x H)

Carton Pack

Qty: 40 pcs

55 cm x 47 cm x 53 cm

(L x W x H)

Container Qty

20GP 7489 pcs

40HQ 18583 pcs

FAQ

Frequently Asked Questions

Why does this sleep bag use adjustable snap closures instead of a fixed shape? +

The adjustable structure allows one product to accommodate different growth stages, extending its usable lifespan and giving parents greater value without purchasing multiple sleep bags.

Why combine mulberry silk, cotton gauze, and Dacron™ Air-Thru polyfill? +

Each material serves a specific purpose: silk provides a smooth cooling touch, cotton gauze improves softness and breathability, while Dacron™ filling efficiently manages moisture and maintains loft after repeated washing.

Why is this design attractive for premium baby brands? +

Its proven success in Japan, premium material combination, and flexible seasonal fabric options help brands develop differentiated sleep bag collections while reducing product development time and improving market competitiveness.

How do you maintain quality consistency across large orders? +

We utilize automated cutting equipment, template sewing machines, quilting machines and standardized operating procedures to ensure consistency. Production teams receive approved reference samples before manufacturing begins, and quality inspectors continuously monitor production to identify potential issues early.

Do you provide spare parts or replacement accessories? +

Yes. To help customers resolve after-sales issues efficiently, we often include approximately 0.5% spare components with shipments when applicable. This allows customers to quickly replace parts without waiting for additional shipments.

What if our order quantity does not meet your MOQ? +

We often help customers lower MOQ requirements by utilizing stocked fabrics, standard accessories or existing material specifications. If quantities are significantly below normal production levels, we can still manufacture the products with an adjusted unit price. Our goal is to help customers enter the market efficiently while maintaining reasonable production economics.

Materials

Materials Used

surface

mulberry silk

mulberry silk 19 momme

Crafted from premium long-fiber mulberry silk, this 19 momme fabric delivers exceptional smoothness, breathability, and luxury. Naturally rich in amino...

lining

three-layer gauze

100% cotton

Made from 100% cotton, this three-layer gauze fabric combines exceptional softness with excellent breathability and moisture management. The naturally open...