Product Size: 26.5*2*19.5cm (Inner dimensions) 28.5*2*21cm (Outer dimensions) Purchased in May 2019 for a Surface Go and used about 5 times a year. The exterior is made of polyester fabric, offering high durability, abrasion resistance, and elasticity, making it tear-resistant, water-resistant, and environmentally friendly. The interior construction uses a layer of polyester foam for shock absorption and scratch prevention, along with a soft fleece lining, comprehensively protecting the laptop from water and scratches.