Clase 28L vs Allpa 18L Daypack: Which Size Do You Need?

The Clase 28L holds more for class or a picnic, while the Allpa 18L keeps essentials organized for commutes and travel. Compare sizes, access, and organization to pick your daypack.

Publishing teamXI LANGS Editorial

PublishedOct 14, 2026

Page updatedOct 21, 2026

Reading time4 minutes

Clase 28L vs Allpa 18L Daypack: Which Size Do You Need?

Quick answer

Choose the Clase 28L Daypack if you carry a laptop plus books, groceries, or picnic supplies and want easy access through a reverse bucket zipper. Choose the Allpa 18L Daypack if you want a compact, organized panel-loader for commuting or travel with a laptop and tablet sleeve and exterior water bottle pockets. The main trade-off is capacity and access style versus compact organization.

Capacity and access: how the 28L and 18L differ

The Clase 28L gives you 10 more liters than the Allpa 18L. That extra space matters when you're carrying a laptop and books or a pack full of picnic supplies. Its reverse bucket zipper opens wide so you can see and reach everything in the main compartment without unpacking the whole bag. The Allpa 18L is a traditional panel-loader, which means it opens like a book and keeps your gear organized in dedicated zones. If you often carry bulky or irregular items, the Clase 28L's larger capacity and open access will feel easier. If you prefer a smaller bag that keeps essentials tidy, the Allpa 18L is the better fit.

Organization and laptop protection

Both daypacks include a padded laptop sleeve, but the Allpa 18L also has a tablet sleeve and mesh exterior water bottle pockets. The Clase 28L has internal pockets to keep your gear organized, but the supplied specs don't mention a tablet sleeve or exterior bottle pockets. For commuters who carry a laptop and tablet and want quick access to a water bottle, the Allpa 18L's organization is more purpose-built. For students or anyone who needs to toss in a laptop and a few larger items, the Clase 28L's internal pockets and wide opening may be enough.

Materials and durability

The Clase 28L is built with recycled polyester fabric. The Allpa 18L uses a highly durable fabric that can handle getting roughed up on trains and subways. Both are designed for daily use, but if you frequently squeeze onto crowded public transit or stuff your bag into overhead bins, the Allpa 18L's durability focus may give you more confidence. The Clase 28L's recycled polyester is a solid choice for around-town use and light travel.

Trade-offs at a glance

Capacity: Clase 28L holds 10 liters more than the Allpa 18L, so it swallows bulkier loads like books or picnic gear. The Allpa 18L stays compact and easy to carry. If you regularly carry more than essentials, the 28L wins. If you want a streamlined bag, the 18L is enough.
Access style: Clase 28L uses a reverse bucket zipper that opens wide for quick access. Allpa 18L is a panel-loader that opens like a book and keeps items compartmentalized. Choose the Clase for easy reach; choose the Allpa for organized packing.
Organization features: Allpa 18L includes a laptop and tablet sleeve plus mesh exterior water bottle pockets. Clase 28L has a padded laptop sleeve and internal pockets but no listed tablet sleeve or exterior bottle pockets. If you carry a tablet and a water bottle daily, the Allpa 18L is more convenient.

Product facts

Clase 28L Daypack: Built with recycled polyester fabric, the reverse bucket zipper makes it a breeze to access the main compartment, and the padded laptop sleeve and internal pockets keep all your gear organized. The wide opening and internal pockets make it easy to pack and find larger items, while the padded sleeve protects a laptop.
Allpa 18L Daypack: This traditional panel-loader pack features a laptop and tablet sleeve and mesh exterior water bottle pockets for the daily. The panel-loading design keeps contents organized and accessible, and the dedicated tablet sleeve and bottle pockets add convenience for commuters.
Allpa 18L Daypack - Del Día: For commuters and travelers alike, the Allpa 18L Daypack hauls all your essentials from point A to point B in style while keeping you organized. This Del Día version offers the same organization as the standard Allpa 18L with a one-of-a-kind colorway.