**Specifications:**
**Brand:** Beipeis
**Material:** 100% cotton
**Features:** Boneless, ventilation
**Category:** Mother and Baby Grade A
**Softness:** Boneless and soft, sweat-absorbent and breathable
**Fabric:** 100% combed cotton, ultra-fine blended fibers
**Cotton Type:** Long-staple cotton from 41°N latitude
**Safety:** Fluorescent-free, formaldehyde-free, chemical fiber-free
**Design:** Seamless boneless design, 4-needle 6-thread technology
**Age Group:** 0-18 months
**Styles:** Side-tie strap style, front-button style
**Seasons:** Suitable for all seasons
**Sizes:** 52/59/66, 59/66/73/80/90
**Special Features:** Anti-bacterial, temperature-regulating, eco-friendly dyeing
**Certifications:** A-grade infant safety standards
**Washing Instructions:** Machine washable, colorfast, resistant to deformation
**Additional Details:** Elastic cuffs, wide crotch space, original illustrations
**Packaging:** Each set includes 4 pieces
**Color Options:** Forest Gathering, Peach Fragrant, Cute Rabbit in Garden, Funny Dinosaur, Forest Club
**Product Information:**
**Brand:** Beipeis
**Product Name:** Constant Temperature Onesie (Front Button Style)
**Material:** 100% cotton (outer and inner), 60g constant temperature cotton filling (80% polyester fiber, 20% viscose fiber)
**Recommended Washing:** Hand wash in water below 40°C, air dry
**Sizes Available:** 66/73/80/90
**Recommended Ages:** 3-6 months, 6-12 months, 12-18 months, 1-2 years
**Recommended Heights:** 60-90cm
**Measurements:** Vary slightly due to manual measurement
**Design:** Features windproof collar button, eco-friendly resin button, ribbed cuffs, front button closure
**Color Options:** Forest Gathering, Peach Fragrant, Cute Rabbit in Garden, Funny Dinosaur, Forest Club
**Note:** The above information is based on the provided content and may vary slightly in actual product specifications.