Coulomb Sonata Series School Bag for Boys

apanese Design | A4 Flat File Compatible | Water-Repellent | High-Grade Faux Leather | 6-Year Warranty

Give your child a stylish, sturdy, and uniquely designed school experience with the Coulomb Sonata Series School Bag, thoughtfully crafted in Japan for elementary school boys. Featuring Coulomb’s original camouflage pattern and contrast accents, this model combines modern Japanese aesthetics with premium functionality.

Built using high-grade artificial leather and pearl-finish fabric, this backpack stands out with a mature, boyish charm. Ideal for children who want something different from the typical randoseru, the Sonata Series represents Coolon’s latest design philosophy – a refined balance of personality, practicality, and durability.

Key Features:

🪖 Original Camouflage Design

• Uses Coulomb’s exclusive camo fabric on the cover flap and front panel for a rugged, stylish appearance

• Features subtle, lifelike “Durugi” design elements for added depth and individuality

💼 Spacious & A4-Compatible

• Large internal capacity fits A4 flat files, books, and daily school essentials with ease

💧 Water-Repellent & Breathable Materials

• Keeps contents dry in rain while maintaining airflow to reduce humidity inside

🧵 Expert Craftsmanship

• Triple-stitched at high-stress points for long-lasting durability

• Lightweight frame with high-strength PE box construction maintains shape without adding burden

🧴 Comfort & Hygiene

• Back panel made with antibacterial, deodorizing, and highly breathable material

• Designed to reduce sweat and heat build-up throughout the day

🔒 Convenient Details

• One-touch automatic lock system for ease of use

• Side hooks, front pocket, and printed D-ring designs enhance utility

• Soft, ergonomic shoulder straps for a snug and comfortable fit

🎁 Bonus Items Included

• Transparent backpack cover

• Shoe bag

• Luxurious gift packaging

🛡️ 6-Year Seller Warranty

• Free replacement within 40 days for any quality issues

• Reliable after-sales service throughout the school years

Product Details:

• Brand: Coulomb (Coolon)

• Series: Sonata Series

• Design: Camouflage + Contrast Coloring

• Material: Premium artificial leather & pearl fabric

• Closure: One-touch automatic lock

• Compatibility: A4 flat files

• Weight: Lightweight construction

• Includes: Transparent rain cover, shoe bag, gift box

• Warranty: 6 Years (with 40-day replacement guarantee)

• Recommended For: Boys in elementary school