Material：Nylon Size: Normal size is 15.7 x 8.6 x 12.6 inches, expand the first layer increases the height to 20.1 inches, and second layer increases it to 27.6 inches, this travel bag can expand from 28L to a maximum of 58L Double-layer Expandable Tote Bag Large Capacity Unisex Suitcase with Spinner Wheels Lightweight Travel Storage Bag for Packing Essentials Easy to Carry or Move Convenient bottom wheels / Expandable design Large capacity travel handbag Supports expansion/trolley suspension/bottom wheel check-in Trolley back design Back trolley pockets for more comfortable carrying Various ways to carry Handheld/shoulder/wheel/trolley Organizer/multi-pocket compartment Stores everything you need for daily use, Traveling with ease Removable silent bottom wheel design Silent bottom wheel / Convenient removable design