It's comfortable without getting stuffy. There's a sense of use, but the functionality is quite excellent. About this product [Size]: W39 x H28 x D13cm [Capacity]: 12L [Weight]: 910g [Compatible Size]: A4 / 13.3 inch PC ★ Comfortable in summer ★ Eliminates heat and stuffiness with a highly breathable back structure and shoulder pads equipped with air vents. Description The [Rapack Air V2] business backpack series eliminates the heat you feel during commuting and allows you to carry it comfortably. It eliminates discomfort by adopting a highly breathable back structure and shoulder pads equipped with air vents to release stuffiness and heat. [Functions to eliminate heat] ・The back is molded in an arch shape and uses a mesh material for high breathability. ・The shoulder straps have mesh material on both sides, and the core material uses punched sponge to increase breathability and release heat. [Storage size] ・You can store A4 files and a 13.3-inch PC, making it ideal for remote work and free address. [Other functions] ・Comes with a chest belt to prevent the belt from slipping off the shoulders. ・Equipped with an organizer pocket that can sort and store small items such as pens and smartphones.