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The exceptionally lightweight Ergobag Flex school backpack is the ideal combination of maximum comfort, flexibility and advanced ergonomics for children in the first years of primary school. With a weight of only 870 grams and an extra-large 23-litre capacity, it offers plenty of space for all school supplies without unnecessarily burdening a child’s back.

Thanks to the innovative sliding back system “Your-Size-System”, the backpack grows with your child from 100 to 150 cm in height (approximately from 5 to 10 years). The backpack focuses on healthy development of a child’s anatomy by transferring most of the load from the shoulders to the stable pelvic area.

1. Interior organisation
   Children always have a good overview in the main compartment with space for exercise books. Thanks to the flexible book compartment, heavy school books stay close to the back. Valuables have a safe place in the mesh pocket with a key ring, and the pencil case is always within reach in the zip compartment in the lid.
2. Side pockets
   The side pockets have space for a water bottle or umbrella. Your child has quick and easy access to the most important items when they need them.
3. Snack compartment
   The front pocket can be easily opened thanks to the zip – ideal for quickly storing a snack. The compartment is made of leak-proof material and the inside can be easily wiped clean in case of an accident.
4. Magnetic clasp
   Easy fastening for small hands. The high-quality magnetic closure can be slid into the open position from the side and, thanks to magnetic force, closes almost automatically.
5. Drawstring
   Thanks to the flexible shape and drawstring, you can pull the contents of the backpack in, bringing the weight close to the back and ensuring maximum carrying ergonomics.
6. Back padding
   The shoulder straps, hip belt and lower back area are generously padded. Even when the backpack is full, it sits comfortably and effectively relieves strain on the child’s back.
7. Size range up to 150 cm
   Children between the ages of five and ten grow on average by 30 centimetres. The Ergobag Flex will fit perfectly throughout this time, because the “Your-Size-System” allows it to be adjusted for heights from 100 to 150 cm.
8. Sports bag attachment
   Ergonomic and practical – the Ergobag sports bag doesn’t have to be carried only as a backpack! On the way to school, it can be easily attached to the Ergobag Flex at three points. This not only distributes the weight evenly, but also keeps children’s hands free!
9. Always keeps its shape
   The backpack has a sturdy, water-resistant base with practical feet. So you can set it down anywhere. If it accidentally falls into a puddle, or your child puts it on a wet floor, the items inside stay dry because the bottom section is water-resistant.
10. Surfaces for Kletties
    There are a total of four hook-and-loop fasteners on the school bag for colourful Kletties. This gives every child a unique backpack that they can change as they like.
11. Space for talismans
    You’ll find two loops on the backpack for attaching Hangies charms. Not only do they brighten up the backpack, but they also help your child quickly recognise their bag among others.
12. Reflective elements all around
    The Ergobag Flex is equipped all around with a large number of reflective elements, ensuring the pupil is highly visible from all sides and in all weather conditions.

• The flexible inner compartment keeps heavy books as close to the back as possible.
• Insulated front snack pocket made from leak-proof, easy-to-clean material.
• Practical side pockets for quick access to a water bottle or umbrella.
• Easy-to-use magnetic clasp designed for small children’s hands.
• Sturdy, water-resistant base with feet that reliably protects the contents from moisture and dirt.
• 360° reflective elements all around for maximum safety in all weather conditions.
• Option to easily attach the Ergobag sports bag directly to the backpack at three points.
• Creative design with areas for interchangeable Kletties pictures and loops for talismans.

Specifications:

Brand: Ergobag
Model range: Flex (Collection 2026)
Intended use: Schoolchildren (recommended age 6–14 years, height 100–150 cm)
Capacity: 23 l
Dimensions: 42 × 30 × 27 cm (H × W × D)
Weight: 870 g
Material: 100% polyester from recycled textiles with a water-repellent finish (PFC-free)

Correct adjustment in 4 steps

1 - Height: Unfold the back section and adjust the straps according to the scale matching the child’s height.
2 - Hips: Tighten the padded hip belt firmly to transfer the backpack’s weight to the pelvis.
3 - Shoulders: Tighten the shoulder straps backwards and downwards so the backpack sits comfortably on the back.
4 - Chest: Fasten the height-adjustable chest strap to prevent the shoulder straps from slipping.

Care instructions: Clean the backpack by hand only. Do not machine wash, bleach, iron, tumble dry or dry clean.