1.[Compatibility]: Internal dimension: 36.5x26x3cm (14.410.241.2 inches). Compatible with MacBook Pro 16, Acer Aspire E 15 E5-575 E5-576, 15.6 Acer Aspire 6 Aspire 3 CB515 Chromebook, Acer Predator Helios 300, Acer Flagship CB3-532; HP OMEN 15 2018, HP 15-BA009DX, HP Pavilion Power 15, HP Pavilion Notebook 15, HP ProBook 450, 455, 650, Thinkpad T580 E580 P51 and most 15.6 -16 inch notebooks. 2.[4 Stage Defense System]: 's laptop case features a four-layer design, equipped with specialized materials to protect against impact. This includes: a top layer that is both water and scratch resistant, elegant EVA padding for contour and protection, EPE foam that mitigates impact, and a cozy fleece inner layer that protects your laptop from scratches. 3.[Superior Impact Resistance]: With its 2cm thick edges filled with high-resilience foam, the sleeve adeptly handles external pressures, minimizing potential laptop damage from accidental drops or knocks. 4.[Using-Friendly Build]: Crafted for simplicity and lightness, this sleeve comes with a fleece-lined compartment for your laptop and a handy external pocket. It's ideal for storing crucial accessories like chargers, cables, external drives, earphones, and more — a perfect fit for daily commuting and business tasks.