[Innovative Vacuum Compression System] saves 80% on clothes storage space, reduces the bulk of your packed clothes, and maximizes packing efficiency. With a one-way outlet valve, you can opt for manually press to release air or vacuum pump for quicker compression. Note: The vacuum seal compartment has an AIR-TIGHT zipper, which is quite tight and requires extra force to pull [Capacity Equivalent to a 24" Suitcase]The vacpack can expand from 25L to 60L, offering extra space for a week-long business trip, weekend getaway, or hiking/trekking gear [Carry-On Size] Will the backpack exceed the size limit at gate? No way, despite its huge capacity, its size remain as a CARRY-ON backpack, measuring 20”*12”*7.8”, airline boarding hassle-free, no extra baggage fees. TSA combination lock will keep your property safe and secure [Durable, Well Made and Comfortable] IKYWT backpack is made of high-density oxford fabric that is water-resistant and scratch-resistant. It features high-quality SBS zipppers that ensure durability and smooth; The backpack has an ergonomic airflow design at the back and is equipped with thick, soft, ventilated padding to alleviate stress on your shoulders and neck, making your trip more relaxing [Multiple Compartments and Pockets] help with organization, ensuring everything has its place. It features three spacious main compartments and multiple hidden pockets, including a dedicated dry/wet separation pocket to separate wet and dry items, isolating damp clothes and odors, and laptop compartment securely holds a 17-inch laptop with a layer of thickened cushion, a side bottle pocket, multi-function pockets, anti-theft pocket for passport, etc 【Important Notice】To avoid the stubborn creases caused by long term compression, the sealed compression bag is designed to bounce back extremely slowly and then clothes will be wrinkle-free › See more product details