- Intelligent pressure-release spring system reduces shoulder strain
- 3d ventilation system keeps your back cool and dry
- Independent 16-inch laptop compartment with quick-release trolley strap
The Bopai B2051, President Series 4.0, is built from double-strand 1680D nylon tested to 40,000+ scratch cycles. It features an intelligent pressure-release spring system, S-shaped ergonomic straps, a 3D ventilation back panel, an independent 16-inch laptop compartment and a quick-release trolley strap.